Thanks for all the feedback guys. I appreciate the different perspectives, and that is why I posted to begin with. My goals are for this to be a street motor, that will be driven daily (for the summer). My '70 Impala is no lightweight racer by any means, and I just figured after a lot of discussion that I would go with a 383 build, as the a little added torque in my heavy '70 might be more fun. I'm looking at a cast crank, and hyper pistons. I'll probably spend more time on the highway than I will burning out, not that I don't want to have some fun. If I didn't want something a little more than what I've already got, I'd be polishing the old stock 350 2-barrel. I was weighing in my mind if I would be farther ahead with the roller block/reusing the lifters than I would be with the traditional hydraulic flat setup all brand new. Thanks!