Engine temp normal, 195*T-stat. Same as always.
Backed timing off to 10* before tdc.
Checked plug wires and distributor, cap, rotor. All ok.
Regapped plugs... OOPS>>> Rookie mistake discovered.
Found the #7 plug cracked around the base of insulator.
Put in a new plug and now she's as smooth as a baby's behind and almost as powerful! Great advice from all you guys... Thanks a million! Owe ya one, Denny. The process has taught me a lot.