Yep, the C4 automatic transmission that was used behind the 302 in the 1974-1978 Mustang II.
I Have found that with the smaller transmission case, flexplate (143 tooth), etc, using it in a V8 Ranger swap will allow more room for full-length tube headers.
Has been done before...But I have also read that this version of the C4 transmissions are weak (particularly the input shaft). And possibly other internal parts.
Wondering if anyone here may have some info, one way or the other, on this particular application. I might be interested in having the internals hardened, or getting stronger aftermarket components. I have seen reference to this, but not much info, so I was hoping someone in a Mustang forum might be of some help with information or advice.
Surely someone has some experience with beefing up this type of transmission in the V8 Mustangs. I went to school with a couple of guys back in the day who ran these Cobras and modified them, however I've lost contact with then over the last 35 years...lol
As for the C4 being weak in the II, I don't think that's necessarily the case. To the best of my knowledge the only thing that was changed for them to be installed in a II was the bell housing and the corresponding flex plate and converter. Otherwise, the transmission is the same as what was installed in other cars and trucks from that era. So, ultimately, you really only need the bell, flex plate, and a converter to make it work for a Ranger swap. Now, given that you're looking for a II specific part, they aren't too cheap or easy to come by. I think locating the bell housing will be your biggest hurdle, otherwise you can pick up a C4 out of pretty much anything and make it work for your application. I also think that whoever was giving you this "information" that these transmissions are weaker than other C4s are basically parroting that the Mustang II is weak, that they are junk, or whatever other bias that a lot of people like to share that look down their noses on the II. Unless they are confusing the C4 with the RAD 4 speed, they are mistaken. So, grab a C4 from whatever, look for a Mustang II bell housing, you can order the Art Carr flex plate or find a stock piece, find a suitable converter, and build the transmission to match your combo and you're golden.