Small block to big block convert questions..

Im also on the fence myself, building a monster small block, or stroked big block. First concern would be block strength for sb, with out going R3 or even finding one for that matter. Headers will be an issue either way. Building a 451/470, plus i think a pump gas, big block (like AndyF built) would be really neat, 93 fuel 700hp on motor... thats tough to do with a small block and making it live. Parts are parts, your going to spend money there which ever route you decide. Weight will be the only downside with a bigblock. Im sure its tight around the spark plugs also with the big block.