O.K., I found an original CARTER Thermoquad 4BBL carby and installed it, the engine seems to run fine -but- on the slightest upgrade it has zero power off idle~ I drove it to the filling station to put some fresh gasoline in it after wrestling the HUGE fuel tank off, repairing the fuel sender and re installing it and could barely get it to go up the slight hill to the man cave where I'm working .
It's been decades since I touched these (mid 1980's) and I don't remember much if anything about them, this Thermoquad carby has vacuum operated metering rods, how are they adjusted ? I see the adjustment screw but have no idea what to do, the factory shop manual and two aftermarket shop manuals simply say "DON'T TOUCH ! BAD MOJO", not really helpful .
Any ideas would be appreciated !
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There's so much wrong / broken / worn out of this battered old rust free rig I'm beginning to write a blurb about it all as some have asked me , I don't know if I should add it here once I'm finished.....