JW , I can understand that circulating the fuel would lower the temp in the carb bowl, but that’s a plumbing project I would prefer to avoid.
78buckshot, I did not observe or evaluate the upstream end of that exhaust port when the manifold was off - simply because I didn’t know any better. Now I know.
HotRod, I think I remember from past discussions that you are a proponent of the Q-Jet. That said, I don’t know how that carburetor would be less prone to heating than the Edelbrock I now have.
Carb King , The 1405 4bbl in question came with the truck. My experience in this area is limited; my research indicates that this carb is on the upper end of the cfm range for the 283 , but should be compatible. You certainly have more real time experience to fall back on. Again- the performance is very good in all ways except shutting down when idling warm. (coolant temp stable at 180) As to the products , I am posting a better image of one of them. It is specific to dealing with hot carburetors.
