331 or 408 i was still planning to get new heads afr 205's, new exhaust 1 3/4 longtubes, 3" xpipe, 3" 1ch flows, not sure on intake yet though, elect water pump so the only belt driven assec. i have is an alt, new oil pan, new msd distributor, sfi balancer. Also going to swap in a tremec so new...