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73 Mustang Enthusiast
Great site.. Thank you. Wasn't aware it existed until searching for a power brake booster to restore my Q-Code.

There appears to be wealth of information and friendly comments here, so I will do what I can to help out and gain some knowledge.

I was a line mechanic for Ford when these cars were brand new, and owned a 73 Yellow Mach with a rare 400 c.i. engine.. Should have never let it go.. Who knew??
Welcome to the site from Virginia. Sounds like with your experience you may have some great knowledge to add to the site. Post up some pics.

Mike AKA Ole Pony & Rare Pony

Our current Mustang garage/driveway
1973 Mustang Convert - Bought in 1974 - Still have it!
2004 Mach 1 Oxford White Auto, Bought Sept 06

[Image: 20180127_082009.jpg]

upload a photo on internet

Welcome from TriCities WA

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

Welcome from Mustang, Oklahoma. Tell us more about the 400 and post some pictures when you can. Chuck
Welcome from Virginia!

Sent from my iPhone using Tapatalk
I too am interested in the "rare 400" engined 73 Mustang. Pretty sure that was never actually made, but...who knows?
Welcome from West Texas! Glad you found us - we always love hearing from folks that were 'in the biz.' thumb


[Image: mach1sig2.gif]
welcome From San Diego.
Welcome from Phoenix. A factory 400 would have been an odd bird for sure. My 335 series engine forum talks about a rare 400 with a small block bell pattern. It would be interesting to see if you car is still around. Any idea what happened to it? Do you have any info like vin, build sheet or ??

Back in the day anything could happen on the line so I wouldn't be surprised if somewhere a 400 got stuck in one. Did you factory order it that way? Was it some kind of 'test' model?

73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
400 interesting

Welcome from Martinez, CA!

73 Grandé
351C 2v
Now 4v Carb/Cam/headers/T5

Gasoline is for washing parts.
Alcohol is for drinking.
Nitomethane is for racing!

Work in Progress photos here:
Last Update: 4/23/16


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