i am currently restoring a '67 s code mustang, a friend has a 31 spline big input toploader, it codes out from a '69-'70 mach 1 or a big block torino, will this tranny fit my car or will i have to shorten drive shaft or anything else - thanks

they will inter change but drive shaft and shift will not fit.mustang is short tail and torino is longer by few inches.

theres tag on pass side of trans with HEH or RUG letters? what are they will id what it is out of.

bummer, i guess i can't use it. the guy has trans and 428 service block with pulleys,ect. from '68 'bird. probably get motor and trans for under 2k. thanks for the input

What tailhousing is on the trans?
Don't be so quick to dismiss the box. 40 years gone things get moved around alot. LOL

http://www.davidkeetoploaders.com/tailhousingid.htm

if cheap $$ enough get it good for trade.the fairlane trans was same as mustang i think? also trans can be shortened not hard new tail housing and mainshaft for stang --done
part are readly avail.

The 67 to 70 Mustangs and Torinos with 390's used 28 spline transmissions. If it is from a 69 or 70 Mustang with 31 splines it is from a 428 CJ or a Boss 429. Get the tag number because if it is a Mustang CJ or Boss 429 trans it would be worth at least twice as much as one from a 390 car.
Frank



Two 427 Tunnel ports -Two 428's!

the guy is pretty sure it is 31 spline. i'll get the tag and casing #'s from him on tues. he also said it could be from a talledaga torino, is this also a possibility?

It could be. The Torino, Talladega would have a longer tail shaft. The numbers will tell everything.
Frank

None of the 69 Talladegas had 4 speeds, they were all column shifted C6`s.

428 powered Fairmont drag car, Best ET:10.03@132.11MPH, best 60 ft: 1.29
59 Meteor 2 dr. sedan 332, Ford O Matic
74 F350 ramp truck 390 4speed

spline came in all 31/28 small/big in . tag # and length you aren't sure what car it's out of.