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FRT SPRING
#1
OK GUYS I HAVE A QUESTION. MY CAR CAME NEW WITH A 351, NOW ITS GOING TO BE A BIG BLOCK, TO ME THERE HAS TO BE A HEAVIER SPRING IN FRONT TO CARRY THE WEIGHT AND MAINTAIN THE LEVEL STANCE. CAN ANYONE HELP?
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#2
Spring selection is influenced by several factors. The added weight of the big block, wheel and tire size, other suspension modifications and last but not least the stance or look you are trying to achieve. I am running NPD's 560 lb 1" lowering springs and they work for me. Many guys run factory type big block springs either with or without cutting coils. It sometimes is a matter of trial and error. Post more specifics about your combo and what you are trying to achieve and perhaps someone here has a similar set up you can emulate.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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#3
THANKS TOM.. I CANT GIVE YOU ALOT OF SPECS AT THIS TIME, BUT I HAVE A 460, C6, AND I WANT TO MAINTAIN A LEVEL STANCE FOR LOOKS AND GROUND CLERANCE. I WOULDNT MIND A SPRING WITH ALITTLE UP LIFT TO HELP WEIGHT TRANSFER IF BY ACCIDENT IT SHOULD GET A HARD LAUNCH
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#4
Pappy,

When I upgraded my 1973 Grandé to a 472 (460 + .060 overbore) , I utilized the KISS principle.

I simply ordered the springs for a 1971 429SCJ Mustang. It worked out fine...in fact, I used that same approach when acquiring parts for many of my interchange "issues" relative to the swap to BBF power.

Hope this helps.


BT

Do the RIGHT thing.
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#5
JUST GOT OFF THE NPD, SITE THAT TOMMY TOLD ME ABOUT. IT DIDNT SHOW THE 560 LB. THAT WAS MENTIONED BUT IT DID SHOW THE 429 SPRING AS A 428 LB. SPRING WHICH IS MUCH HEAVIER THAN THE 351 SPRING. THANKS TO YOU BOTH, I WASNT SURE WHERE TO LOOK.
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#6
68-71 COIL SPRINGS FRONT, PAIR Item #CS8356
68-71 COIL SPRINGS FRONT, PAIR
71 with 429 engine and 68-70 with 428 engine. Price: $79.95
from Ohio Mustang

http://www.ohiomustang.com/store/item_li...&p=4&ps=10
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#7
Tnfastbk;11733 Wrote:68-71 COIL SPRINGS FRONT, PAIR Item #CS8356
68-71 COIL SPRINGS FRONT, PAIR
71 with 429 engine and 68-70 with 428 engine. Price: $79.95
from Ohio Mustang

http://www.ohiomustang.com/store/item_li...&p=4&ps=10

Man, talk about service! Good job, Roy!

Doc

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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#8
I THANK YOU GENTS. AND CALLING DON WAS MY NEXT STEP, HE'S BEEN GREAT TO ME. IM FORTUNATE THAT THE LAST ORDER I JUST DROVE UP AND PICKED UP. HE'S ABOUT 1HR AND 45 MIN. FROM ME AND SAVES ALOT OF SHIPPING. MY CAR WAS TORN APART IN FRT WHEN I GOT IT AND I NEEDED MESURMENTS FOR THE FRT END AND DON SAID LETS GO TO THE GARAGE,AND GAVE ME A TAPE. GOT TO STAY WHERE YOUR WELCOMED.
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#9
cobra3073;11728 Wrote:Pappy,

When I upgraded my 1973 Grandé to a 472 (460 + .060 overbore) , I utilized the KISS principle.

I simply ordered the springs for a 1971 429SCJ Mustang. It worked out fine...in fact, I used that same approach when acquiring parts for many of my interchange "issues" relative to the swap to BBF power.

Hope this helps.


BT
+1 on the 429 stuff.
Interesting piont.Back in the day when I worked in the parts stores I looked up the part # in the Mooge books.The 71 429 and 71-73 351 with AC and handeling package used the same spring.I have those springs under my car now.



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#10
FASTE NOW THAT IS A BIT OF INFO THAT I WOULD HAVE NEVER THOUGHT TO HEAR. BUT IT IS A GOLDEN THING TO KNOW. MY ONLY PROBLEM IS MY CAR DIDNT HAVE AC, BUT I BET IF I ASK FOR THE 351 AC IT WILL BE CHEAPER. THANKS
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