Turned down 428 crankshaft
Hi Adamo
I am no expert by any means but I think Butler sells a rotating assembly to accomplish what you are trying to do with your 400:
https://butlerperformance.com/i-2459...-4-000str.html
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Three times the sound peaks, falls back, peaks again. A throttling back to cruising speed, a dwindling grumble of thunder and...gone.
The frogs take up where they left off.
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