I plan on starting with a bare block, and plan on running alum heads with I beam rods, and a roller cam. Im not sure of what heads, cam, intake, rod length...I thought about using a 4.25 stoker crank in the 454, but whot rods would I have to get? or I want to put a 4.00 crank in the 396, and again not sure of rod length? I have heard that the 396 blocks are weak?

Thanks
Harmon