Well dropped the motor off to the shop today. They will start tearing it down on Tue. Just wanted to get a few more piston choices from any body. I know there not many for the 383. Come to the idea that 400 hp or around is more realistic. They will also let me know what heads are on it. It's safe to say that the holley 600 has to go even if it was jetted differently. Any more thoughts would be great. Thanks