Something i came across hope it helps some of you cheers
Practically no V-8 on Earth will cost you more to buy or build than an original Hemi, so it goes without saying that the very common 440 block is inherently cheaper. The thousands of dollars you'll save on using a 440 as a starting point is money that you can spend on things that you actually want to spend it on, like a 520-cubic-inch stroker crank or a turbo setup. An aluminum-headed 440 block also comes in several hundred pounds lighter than an original Hemi. Bear in mind, though, that you'll really need to rev the 440 to get it into the Hemi heads' operating range, so plan accordingly.
A 440 block may lack the cross-bolted mains and extra reinforcement that make a Hemi capable of withstanding thousands of horsepower, but the Wedge is no slouch where power potential is concerned. Even a garden-variety two-bolt main truck block can withstand over 800 horsepower, and an aftermarket four-bolt block can take as much abuse as any Chrysler motor. While 1976-and-later 440s have the thickest main webs and strongest blocks of all the engines in this displacement range, you might consider starting with a 1972 to 1973 400 block (casting number 3614230) instead. These blocks have truly massive main saddles, and are among the strongest Chrysler blocks ever produced, short of the Race Hemi. The 1973-only 400 (casting number 3698630) is good second choice if you can't find an older block, but its main saddles are nowhere near as thick.
