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Hello from another newbie. What a great forum for these overlooked Mustangs. while I currently own a 2013 GT, I'm looking at possibly buying 1973 with a 351 C 4-bbl "Q" engine and auto trans ("U"). For '73, I noticed the AMA specifications (in the technical section) indicated 259 horsepower, while all the published sources say 266. Does any one know why the discrepancy exists?

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Welcome to the site from Virginia. Good luck with the purchase of the 73. Post up some pictures of your potential purchase.
Welcome from Arkansas
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 Perth, Australia. Sorry I can't answer your question, but I suspect someone here will.
welcome from another Aussie from Bundaberg

He has all the vices I admire and none of the virtues I despise
Welcome from northern California.


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Welcome from western Tennessee! welcome

Rusty, a 1973 Mach 1, needs a lot of work.
Billy, a 1976 Ford Bronco, also needs a lot of work.
El Guapo, a 1986 F150, frame-off Resto-Mod.
Bubba, my 1994 F150, daily driver
Formerly, a 1973 Ford Mustang Coupe - a work in progress, then a car-b-qued banana.
Hi and welcome from Luxembourg, Europe.

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"If I were you...... I´d rather be me."  Tongue

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Hi from Phoenix. I can't answer your question but I can tell you that neither are probably correct. LOL.

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:
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