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Hot Rodding the Lincoln
#1
The Edelbrock Performer 400 4-barrel conversion for the 2V 400/351M engines have been intriguing me for a while - and since the '78 Mark V has had an intake manifold gasket leak on it for a while, I decided to try the conversion out myself.

List of parts (as it stands now):

Edelbrock Performer 400
Holley 1850-4 #4160 (wrong carb though; might have to swap)
Felpro 1240 intake gaskets
Holley 108-51 carb base gasket with heat shields

The setup:

[Image: holley_edelbrock.jpg]

I'll also need to get some brake line to flare and bend to connect the PCV. I did this once before on my Mustang's 351C with excellent success:

[Image: 71_mustang_19.jpg]

I pulled the Mark V's original Ford (steel) 2V intake today, and almost castrated myself in doing so. 70 pounds of worthless iron, in my book.

Underneath, the replacement valley pan gasket - Ford's wonderful idea of preventing boiling oil on the bottom of the intake due to EGR. Note the gap at the bottom of each intake port:

[Image: 78_markv_plenum_1.jpg]

[Image: 78_markv_plenum_2.jpg]

[Image: 78_markv_plenum_3.jpg]

My guess is that the rubber end gaskets kept the valley pan gasket from seating at the proper height, leaving a gap at the bottom of the intake ports.

At any rate, I was able to install the Fel Pro 1240 gaskets with no problems - the adhesive cork at the ends worked beautifully, and I tacked the gaskets with the slightest dot of Permatex High-Tack gasket sealant on each side to hold them in place. RTV'ed the corners, and slid the manifold in without breaking my back. It went in perfect the first time.

A hellish rainstorm prevented me from getting any farther, but here is how it sits at the moment. Forgive the poor lighting.

[Image: 78_markv_plenum_4.jpg]

FYI: No timing chain or camshaft swaps planned. Can't afford to have the Mark V out of service.

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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#2
What's wrong with the carb?
CFM-wise, it should work perfect on a stock 400 in a behemoth like the Lincoln thumb

Pete - MotoArts Decals and Signs
'71 Sportsroof 351C-4V/4-speed - FINALLY under construction - no, wait, on hold again...
'90 Mustang 7-Up 5.0 ragtop, rolling beater
'66 Sunbeam Tiger Mk.IA, survivor
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#3
MotoArts;128942 Wrote:What's wrong with the carb?
CFM-wise, it should work perfect on a stock 400 in a behemoth like the Lincoln thumb

Motorcraft 2150, 300cfm. Nothing technically wrong with it in terms of specifications, but I just don't quite care for them as a carb. I suspect the original intake may be on the restrictive side as well, and the EGR port on it doesn't help vacuum issues.

Plus, I got the intake cheap Wink

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
  Reply
#4
I meant the 1850.

The heads on the 400 are the downers. The exhaust port has a "belly" in it that can't be removed; it restricts flow. The belly is a water jacket.
Can be swapped for standard OC 2V Cleveland heads for more flow, same compression. You can use the Edelbrock intake also.
Aussie 2V's on a stock bottom end would be my choice for a driver, if I were going to do heads.

I once tried advancing the stock cam in a good, tight, original 351M in a '78 F150.
Didn't do a thing... mileage or performance was still meh.
Cam change probably won't do much without a compression increase and headers either... save your money.

Pete - MotoArts Decals and Signs
'71 Sportsroof 351C-4V/4-speed - FINALLY under construction - no, wait, on hold again...
'90 Mustang 7-Up 5.0 ragtop, rolling beater
'66 Sunbeam Tiger Mk.IA, survivor
  Reply
#5
MotoArts;128949 Wrote:I meant the 1850.

The heads on the 400 are the downers. The exhaust port has a "belly" in it that can't be removed; it restricts flow. The belly is a water jacket.
Can be swapped for standard OC 2V Cleveland heads for more flow, same compression. You can use the Edelbrock intake also.
Aussie 2V's on a stock bottom end would be my choice for a driver.

I once tried advancing the stock cam in a good, tight, original 351M in a '78 F150.
Didn't do a thing... mileage or performance was still meh.
Cam change probably won't do much without a compression increase and headers either... save your money.

EDIT: Almost forgot - the Holley has manual choke and doesn't have a Ford auto trans kickdown linkage. Granted, if someone can sell me a 600cfm Holley base with kickdown...

The whole thing is a budget build - improving where only a fix was needed. Quite frankly, the car isn't worth $500 as it sits, in my opinion, but it does its job.

Didn't know that the head change would keep the same compression; good to know. Couple of 2V 351C's around here for cheap too.

Good to know about the timing chain; won't bother with it then!

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
  Reply
#6
say what?!?! if thats the case I'll give you 400 ;p

[Image: 2cossj6.png]
97 F150: wrecked, 96 Dodge 4x4: blown motor / donated to the base
88 Suburban 4x4 355 cid 8 inch lift: sold, 95 Celica 5 speed : sold
68 F750 391 cid : sold,  96 F350 7.3 diesel dually : sold
86 Chevy 1500 305 cid c1500: sold, 73 Mustang mach 1 466 cid 5 speed : under construction
89 F350 4x4 cummins swap : sold, 64 Dodge d600: gone
00 Excursion: traded, 72 Mustang mach 1 302: scrapped
73 Mustang coupe: scrapped, 73 ranchero gt
06 Honda crf 450x : sold, 04 Honda vtx 1800
88 Bronco xlt lariat: sold, 76 Charger: traded
95 F350 4x4: sold , 91 Crown Victoria 302: sold
02 Dakota: traded, 96 f250 powerstroke: parts truck
87 f700, 98 e350 powerstroke: sold
03 land rover: traded, 95 f350 dually: part out
95 f350 dually: traded, 94 f150 4x4: traded
97 f250: sold, 76 Maverick 302: sold
91 240sx rb25: sold, 86 firebird: sold
86 Trans Am: sold, 88 westernstar: sold
89 dodge d350: sold, 2000 Dakota 4x4: sold  
84 f350 3+3: sold, 90 bronco: partout
67 catalina, 64 chevy c60
64 jeep j200, 74 corvette stingray
79 Lincoln mark V, 2013 f350: goldilocks
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#7
auron73mach1;128952 Wrote:say what?!?! if thats the case I'll give you 400 ;p

After the Eddy conversion, it's $750 Tongue

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
  Reply
#8
hmmm I might just have to make a trip to florida for that price

[Image: 2cossj6.png]
97 F150: wrecked, 96 Dodge 4x4: blown motor / donated to the base
88 Suburban 4x4 355 cid 8 inch lift: sold, 95 Celica 5 speed : sold
68 F750 391 cid : sold,  96 F350 7.3 diesel dually : sold
86 Chevy 1500 305 cid c1500: sold, 73 Mustang mach 1 466 cid 5 speed : under construction
89 F350 4x4 cummins swap : sold, 64 Dodge d600: gone
00 Excursion: traded, 72 Mustang mach 1 302: scrapped
73 Mustang coupe: scrapped, 73 ranchero gt
06 Honda crf 450x : sold, 04 Honda vtx 1800
88 Bronco xlt lariat: sold, 76 Charger: traded
95 F350 4x4: sold , 91 Crown Victoria 302: sold
02 Dakota: traded, 96 f250 powerstroke: parts truck
87 f700, 98 e350 powerstroke: sold
03 land rover: traded, 95 f350 dually: part out
95 f350 dually: traded, 94 f150 4x4: traded
97 f250: sold, 76 Maverick 302: sold
91 240sx rb25: sold, 86 firebird: sold
86 Trans Am: sold, 88 westernstar: sold
89 dodge d350: sold, 2000 Dakota 4x4: sold  
84 f350 3+3: sold, 90 bronco: partout
67 catalina, 64 chevy c60
64 jeep j200, 74 corvette stingray
79 Lincoln mark V, 2013 f350: goldilocks
  Reply
#9
auron73mach1;128954 Wrote:hmmm I might just have to make a trip to florida for that price

Save your money and offer $3,500 to this guy, he'll take it. Vinyl roof and trunk padding are dealer-added, but it is a very well cared for example:

[Image: 3851287213.html]

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
  Reply
#10
Please take a good look at the pics of the pan gasket leaks at the bottom of the intake ports that cudak888 was kind enough to share. This is the source of the manifold leaks that so many here have been trying to find. When we get questions on bad idle or "rich" conditions and i say "intake manifold leak"...THIS is often the problem that owners cannot grasp. If there was a manifold leak there would be a lean condition right? Well not if the pan gasket isnt sealing and allowing oil to be sucked into the intake ports. You cannot get a smooth idle due to fluctuating vac and the oil seeping into the fuel produces smoke out the exhaust. This seems to be diagnosed as a rich condition and owners spend days adjusting the carb! You will not find the leak by spraying WD-40 around your carb/intake (that has got to make a mess and may remove paint?). Im guessing your vac gauge readings will be off as well? You have to remove the pan gasket and reinstall the intake correctly. I'm no genius but i have made this suggestion a few times to no avail. Owners continue to fiddle with the carb for weeks! so, thanks cudak888 for the pics! While we can see why Ford would look to the pan gasket to aid in a dry intake manifold design, it produces more tuning problems over time than the performance enhancement it was designed to provide. I have posted here in the past that my engine builder refuses to use the pan gasket because of the leaks. The aftermarket Air-gap, tunnel ram, funnel web intake designs reduce the "hot oil on the bottom of the dry intake manifold" issues. I can't fit them under my hood. But i have a 375hp street car with auto trans. it's not that big a problem. Im guessing a cooler intake with cooler air/fuel mixture could reduce potential for pinging? Maybe after i get a nasa hood i'll install the air-gap intake and do some testing on my timing advance. I expect it will show a measurable increase in performance.
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