396, 454, 502,540 all big block Chevrolet motors all a combination of different piston bores and crank throw. As stated above they are all the same physical dimensions, a 496 is the new GM based big block and is interchangeable by physical size only however most components won't exchange.

Swap Shop, Sick Stinger (Mike Mello). Probably the fastest way of getting what you need. Good take-outs from parting boats.

Post something in the Wanted section.

awesome!! Time to look for 502 then.

I bought 2 new base 350s from them, and am very happy with the overall experience.

I would use them again if I needed engines.

Mesa Balancing in Miami might have some in stock.