Just early a bucket seats going in a car that dont have buckets will make workJust for reference, 64-5 are a completely different seat than the 66-7 seat. Might not make a difference if they're not going into a 64-5 car that has the interior altered in some way, but the tracks, width, and function of the 64-5 seats is much different than the 66-7. Just trying to help, and maybe a better description of what you are installing them in will help you get the proper seats you need!
I have a pair of 65 dart buckets with tracks and original black covers (useable condition)I can get pics tommorrow if interested $250+trip money.Just early a bucket seats going in a car that dont have buckets will make work