Mopar purple .528 for a 383?

MidnightSwinger said

Once I finally crack into it, I’ll shoot for 10:1 with the 906’s and more when I can afford a good aluminum head. It could be there now, the motor is a real HP that’s been “rebuilt” and passed a few hands before I inherited it. I won’t be surprised to find it at 9.5 but I wouldn’t be surprised if it was 8:1 lol

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I think the HP was rated at 10.25. But of course as we're all aware, they blueprinted less. Still though, pretty formidable. 425LBFT stock ain't nuthin to sneeze at. I would think if you get it to an honest 10.1 I wouldn't advance it any more than what the card says. At maybe about 9:1 I might think about a few more degrees. JMO.