headers are going to be high $ for it if you have to buy new. if you already have mounts, you are ahead. would have to look at parts book in garage to c if fork for 3/4 speed is same. 4 speed you have will be ok but driveshaft may b weak point at flange. there are other ways around the header deal. i have owned 6 of those cars. i grew up around the 62-65 cars. then i got into a bodies. i like both very much.