my self I would go small v8 with a standard trans, I find them more fun to drive and you would get better milage with a stick . As far as parts go there is lots out there from catologe shops such as brothers truck and LMC. I prefer brothers truck my self.As far as other parts shops go if you can find a good shop with someone with knowledgeyou should be able to get what you need. I have never had a problem with my 1965 GMC exept for emblems but they can be made up.Power stearing and brakes can be added no problem there are kits out there.My self I would stick to the 64 to1966 models. If you have any more Questonns I would br Happy to help out as I have done a few of these trucks. Here is my photo bucket album name. Just punch in photobucketradical65gmcif you would like to see some pics
Hans
