What I need to know is: I want to find several warranty unstamped blocks for some of my cars that do not have their original motors. Should I be expecting to find 383 and 440 blocks with HP and HP2 stampings or just a block with 383 or 440 stamped into it? Is a warranty block just a warranty block in most cases, or were the "HP" stampings the norm or the exception? I would think that a 383+2 or 383+4 LP original block would be replaced by Chrysler with non HP block in both cases, but would an HP block always be replaced with another HP warranty block? Sorry to be so wordy.