I like the info thanks. I had the motor put together by a local machine shop and took whatevere advice they wanted me to do. I also gave them the cam as a base for the valve train. cam lift is .524

I was thinking of using the comp 280H it has a .530 lift but i dont know what the springs will take and dont want to brake them. The springs are green if that does anything to help

I think I ll stay with the torker and switch the cam but i dont want to replace the already new valve train.

Got a anther question The book on says that a stock 70 351 4v has 10.7 to 1 compression I bored it .30 over with TRW flat top pistons also surface the heads what compression should I have?