I have swapped the leads on the pickups in 2 distributers and it does change the timing when swapped but I end up with it right back at 50 degrees to run either way. It does start better the correct way with both distributors and both ignitions. But maybe I'll get a pick up coil for the msd and put it on the list. Along with a leak down test.

The carb is a brand new aluminum hp. With 4 corner idle, replaceable air bleeds etc.. The part # is 82851sa.