Silv-O-Lite Pistons Good or Bad?

I understand. The 64 can certainly fit a V8 too.
I have heard from a few people that it is easy to swap a /6 with a V8, but I have heard from more people saying it is a major hassle. I have been considering doing it due to the ease of finding parts and the parts are generally cheaper, but I want to be able to keep the 904 pushbutton trans and I have been told by numerous people that my trans cant be paired to a V8.