You can do your 440 way cheaper than 6k. Jeesh you can buy fulley assembled 500ci 500hp units for 5k. Those "Hemis" you are looking at online are from wrecked cars/trucks. Who knows how well one is going to run. You going to stay w/ EFI? Plan on spending $$$ on sensors and extensive wiring. And headers? Plus the new Hemis are drive by wire. No need to even stroke it. Youcan call summit and get a rebuild kit w/ forged pistons for waht $7-800? Those Hemi conversions look easy however I don't think it's something an average Joe can do in his gargae.