Distributor didn't change symptoms.
Ran the valves according to Comp's EOIC method but used 3/4 turn pre-load vs 1 turn. #8 exhaust was loose at 1/4-1/3 turn of pre-load from zero lash, the others were pretty close......though I'm getting doubtful of my competence at this point.
Once the radiator shroud and fan are back on we'll fire it and see what happens.