just rebuilt runs bad

6tfo said

Just got off the phone with the machinist. He's going to come out and look at the motor, he hopes next week. So that's great news.

Regarding the Mancini timing chain. He said with the intake valve at TDC (Maximum lift?) it was off spec by around 10 degrees (ref degree wheel). He said there are two keyways on the Mancini kit that can compensate 4 degrees, but that wasn't enough to bring it to spec. When they tried another chain kit everything lined up.

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These are all good: First, a second set of eyes and a fresh outlook always helps. Second, he's agreeing by action that there may be an issue with the work and he's concerned enough about you (beyond the cash) to make his investment in unpaid time. Third, he described why the chain was not good enough. In truth, I don't use MP cams anymore because I've found them to be so badly ground. It does happen. New doesnt mean good. Keep the faith and your patience.