Bringing old bucket seats back to life

ok, i got some 66 barracuda bucket seats for my 64 off ebay. they need to be rebuilt though. has anyone done this before? ive never stripped the skins off a seat before. there is some rust. i need advice or tips on rebuilding them. i also need to drill new holes cause the 66 buckets are smaller then my 64 buckets. any tips on mounting them, as far as drilling new holes or getting them in strait would be helpful. thanks.