Blocks and internals the same?

pretty sure going with the J heads. Was already planning on milling th heads to get aobut a 9.5 to one comp and probably using Kieth Black Hypertectic pistons. When He starts using his own money, we will stroke a 360. For right now probably jsut go with a cam just a little bigger than a 340 hp cam, any suggestions would be helpful. Whats the smallest solid lifter cam, if there is one, that can work with this combo?