Well No Wonder.....
So I guess I should trust my instincts more. Turns out the PO had intentionally retarded the timing in order to get it to run halfway decent with a bad carburetor.
Took the car in to a local mechanic and he discovered that the idle mixture screw for the left bank is broken / has no effect. He also verified the crazy timing setting and set it back to 8 BTDC as it should be. Car now really runs like crap.
Off to buy a replacement carburetor. Many thanks to all who have helped me work through this.
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Mark
Las Cruces NM
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Current Project:
'67 Catalina Convertible
400 4-spd
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