B1 intake, 1mm,1mm (Napier),3mm rings. Single QF1250 carb, AR3910 Plugs. I had pistons coated on the heads and skirts. When engine came off the dyno I installed it and checked the timing. It was at 41° with two different MSD boxes, crank triggered. I was told engine made best power at 37°, so I set it at 36° with an MSD HVC Pro and specific coil. I do not understand how the crank triggered ignition can do that unless the ignition system it was connected to on the dyno could change the fixed timing.
It is a 4-7 swap cam. Aeromotive tank with internal pump, solid at 6psi.
Plugs looked good, although I think I had a heads up from the plugs in some "peppering" , extremely fine black specks (not aluminum) which I now am convinced was some thermal coating leaving the pistons on a couple holes.
The oil contamination occurred when the piston/rings failed and pressurized the crankcase above what the 6-stage Dailey Eng oil pump could evacuate. Do not have the piston out of the bore yet.