My 67 coupe

[WantaGT]

Alright guys i found a heck of a deal on a 1967 Mustang coupe about two hours from me. Monday I pick it up. Well anyways it's black with a black vinyl roof and perfect black interior. It's got cragar wheels and decent tires. The engine has 75 miles on a rebuilt 289 with stock heads but it has an Edelbrock performer intake, holley 4 barrel, mild cam, dual exhuast and upgraded electronic ignition. no rust or anything. The guy has to get rid of it and I am gaining from his loss. One last question, with these mods (stock gears, convertor and weight) what should this car run in the 1/4?

 

[2bav8]

Anywhere from 17 to 15 seconds, depending on gearing, driver etc.

 

[WantaGT]

why such a big range?

 

[Ozsum2]

Basically he told you. Depends on if your driving skills are inept, and depends on what rear end gears you have.

 

[WantaGT]

well it's an auto, does that help any? and i'm not sure what gears it has, they're stock.

 

[2bav8]

An auto, 2.80 gears and a non-worn out engine should be hitting 16s.
"small cam" could see 15s

 

[WantaGT]

thanks man, thats what i wanting to know. i'm sellin my 5.0 to buy this and i didn't wanna give up all my performance. another question, what gears should i step up to that will allow me decent performance and decent cruising rpms. i was thinking 3.55 or 3.80, what do you think?

 

[2bav8]

With overdrive, I'd run 3.50 to 3.73s.
Without overdrive, its going to depend on how much freeway driving you do.
In AZ we're going 75 mph all the time, that's a lot for anything more than 3.00 gears without overdrive IMO.

 

[WantaGT]

no overdrive here, but it's more of just a cruisin car. see the reason i was askin about the steeper gears. alot of guys with 5.0s and c4's run 3.73. so i thought i could run 3.55 and get away with it

 

[WantaGT]

oh and are a set of tri-y headers worth the cash?

 

[2bav8]

so i thought i could run 3.55 and get away with it

Like I said, it totally depends on your area.

Tri-y headers arn't bad on stock and mild motors, one might say they are worth the ca$h.

 

[WantaGT]

this may sound like a total newbie question but i'm used to doing exhaust with stuff already made up. with tri-y headers you bolt the collector the headers, but then do you cut the existing exhaust to slip onto the collector? sorry if i sound comletely stupid right now, i'm new to the classic mustang arena.