I have a c4 or c5 on my 81 T-top I think its some weird revised version of the c4 with better parts but mostly the same and its a 3 speed with "passing gear" not "over drive" but when you get to the top of 3rd let off a little and slam the gas back all the down you'll go right past them like a sling shot, its pretty funny to since when you let off for a sec you seem to be slowing which you are a little, but then you'll catch em, try it I think they all have passing gear, Somebody correct me if I'm wrong | 
Want to retain the stock console/shifter in 1967 Mustang. 
