you arent getting one without modifying anything... if you have the money and have to have a 4 speed auto, the only one thats going to work is a e40d out of a 94-97 pickup with a 460 in it... youll need a bauman controller... youll need to modify the floor pan... youll need to modify your driveshaft... its definitely not going to be easy or cheap. why do you feel the need for a 4 speed auto? the c-6 thats in your car now is as bulletproof as youre going to get... and with the rear end ratio your highway rpm will be plenty low