Original post was about putting a 383 in my '73 Challenger...about 2 1/2 years ago. My engine builder, renowned race engine builder in my area throat punched me! We wanted anywhere from 400-425 hp. I picked it up and he charged me twice what we originally discussed and BEST dyno pull was only 352 hp and 408 torque. His excuse..."we were never gonna get those numbers from a 383". Then why didn't he say that the day I dropped it off??? This is a shop that builds 1000+ hp engines for a...
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