I already run the dist with vacuum unplugged, no change.

I'm already at 12º-14º. less than that will be too loopey than wished.

engine combo for those who don't know:

400 stroked to 3.75
KB215 pistons
282HDP crower cam
10.3 static CR average ( say average because block was uncorrectly decked, with slope from front to rear )

With a Charger born in Chrysler assembly plant in Valencia, Venezuela