just rebuilt runs bad

At 15 BTDC the motor no longer backfires through the carb and their are no unusual noises or sounds. Unfortunately it runs bad with no power and pings and misses when throttled while driving. Also ran poorly at 20, 25, 30, and 35 BTDC. Not until I set initial timing at 45 BTDC did the engine run well. At 45 it seems to run great. A very quick mash of the petal starts to turn the car sideways. No pinging, good temp, good oil, not hard starting.

This post started with the engine running well at 60 BTDC. Now it doesn't run at all at 60. There was also backfiring through the carb and noise at 10 BTDC, at 10 now the noise and backfiring is gone. So there is some improvement but I really haven't changed much, relocated the MSB box and wiring and just for grins changed a distributor spring from heave silver to light blue. The rest just lots of testing and verification.

I don't like to throw money at things without at least thinking to myself that I understand but in this case I'm ready to buy an new distributor. I just don't feel good about the one I'm using now and it's been suggested a couple times by others in this post.

Still baffled, still looking for new ideas and feedback. Thanks.