1966 Plymouth Valiant /6 & Holley 1945 carb can only get to idle at 1250rpm. How to get a lower idle without dying?

jacraest said
I at the moment, have a 1945 which is pretty crusty and fubar looking, a 6145 (no difference after rebuilding) on the car, and a 1920 that I can’t get fuel flow after rebuilding. I also have no idea what throttle linkage I need for it.

pictures. pictures. pictures. these cars are 50+ years old, who knows what's been changed.

if you can't get fuel, check/adjust/re-set your float level.

Do you think the weird exhaust manifold I have could be playing any sort of role? It’s closed but I wonder.

again, pictures. i have a sneaking suspicion that the motor has some kind of a bitza situation going on.

as to the exhaust manifold, have you checked the operation of the heat riser flap (aka the butterfly in there). make sure it's not froze up and restricting flow.

Also, the intake flange gasket just has the “rough cut” thick looking one, and a thinner one. Am I supposed to use both, or just one? The car just has the thicker one on it.

one gasket only. likely the "rough cut" thicker looking one is the one you want. but bear in mind certain carbs have specific base gaskets and you could be inducing an airleak by mixing and matching pieces around.