[quote=]I talked to an engine builder who quoted me a fairly good price on a 440/493 motor. I know the 440 would be a monster because of the obvious more displacement. [/quote] (1) a good price (2) 50 more cubes. if everything checked out I would absolutely go with the RB. EDIT that is what I was gonna add, what Andy said: the height of the "V" is roughly ~3/4 taller out at a 45 angle on the RB than the B so if it is setup up for a B now, the RB would kick the headers/ex up that much which may or may not make a fitment prob and the alt/ps would be slightly different but those would be easy to work around, that would be the main thing that would make me possibly want to go with the B & I believe most if not all RB's weigh a bit more otherwise I'd definitely want the 493 cubes in there. You're talking a thousands of dollars purchase, be SURE to check things out head to toe