To me it sounds like the engine isn't warmed up yet. Mine is the same, 283 with a 2G, takes a couple of miles to get the engine warm and smooth out the carb and RPM. I'm running a new 180 degree stat but thinking of trying a 190, my AutoMeter temp gauge will hit 180 then the stat opens and runs at 170 degrees the rest of the drive. Does your engine have a heat riser on the right manifold? in the 2 ton application such as mine, the system did not use a heat riser, it just relies on the exhaust cross-over in the intake manifold. Could be loaded up with carbon and not heating the plenum floor.
Last edited by 78buckshot; 12/17/2023 2:48 AM.
