Doug's headers not fitting - frustration

340sFastback said

Awesome you kept at it found root cause and avoided the sledge hammering.

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How do you like the 391 gears? I was thinking of putting them in my 66 barracuda. I have a dyna rear I'm putting in it. I built a 360 magnum motor for it pushing 470 hp. It was a tight fit. Had to go serpentine belt change and a different ps pump.