Mild 318 misses at 3000rpm

nm9stheham said
Back out at least 5 degrees and then 10 degrees of timing and see what it does. If it is rotor phasing, then that will improve it some. When I first listened, I was thinking detonation so what you have for total timing and at what RPM are critical. But the rotor phasing idea is a good thought.

BTW, what KB pistons do you have? Your cam is small (torquey) and the DCR will be high 7's with the KB167's.

That's where it's a guessing game. This motor was built by a third party and was sold to me when the car it was built for was sold and that buyer wanted a big block. The pistons are some version of the hypereutectic KBs but I don't know for sure which. I got the whole thing carb to pan for a song.