340 with edelbrock heads overheating

ok, got it back togeher . same thing is happening.

one thing i did while playing around trying to figure what the heck is going on is i disconnected the pvc at the carb . the idle increased. Then i took it off at the valve cover while still plugged into carb, it did not like that. When i disconnect at the carb and plug the pvc at the carb with my thumb it wants to die. am i on to something?

finally i noticed the metering rod was jumping up and down while at idle. I went to the blue spring and that solved that.

last the ide mixture sceews are now very little responsive. IF I turn them all the way in they will not kill the car. SO I may still have an issue of some sort.

I am using a mid 80s chevy pvc because it fit in the grommet. Have not found another yet that does.

any suggestions?