First of all, there is probably no way that you will enjoy any part of stripping your '60(so be prepared). If you aren't taking any of the body panels off of the truck, I would suggest simply using aircraft remover or another methylene chloride based stripper. One can(1 qt.)goes pretty far. It would probably do the hood and one front fender. This way is, of course, very time consuming and since you are dealing with tons o' chemicals, not very pleasant. Traditional sanding is unbelievably slow, so I try to avoid it. If you are disassembling the body, it might be worth the money to have somebody proffesionally media blast the panels. Make sure nobody sandblasts them because they will warp and possibly get ruined from the heat. Sorry, that's all the advice I can give you. I don't really know any tricks or shortcuts when it comes to paint removal, but somebody else may be able to help. Good Luck.
R.K. TrustyRusty65