Hi everyone, I'm still new to this site but it seems like a very trust worthy site. I have a 1990 350 TBI. I'm planning to have the heads ported out and polished, new intake, and cam. But I cannot decided on the cam I want. I wanna put a roller cam in there. But I do not know if the block is roller cam ready, does anyone know the years GM made roller ready blocks? And what cam could I use that would run on the stock tune? Thanks in advance!