Tonight I removed valve covers, removed distributor cap, removed spark plugs. Turned engine over slowly by hand and confirmed that harmonic balancer 0° mark perfectly aligns with TDC of compression stroke on cyl 1 (i.e, both cyl1 valves closed, thumb on spark plug hole to feel compression building, a wooden dowel on top of piston until crankshaft is just barely past the point where piston stops moving).
