I have a 79 Cj7 with a 304. I installed a Holley 600 carb and Edelbrock
intake. It has no smog equipment. The engine runs very smooth. The
problem is it won't idle below 1000 rpms with the idle screw all
the way out and slack in the throttle cable. I am hesitante to put
smaller main jets in for fear of running too lean. It has two vacuumn
lines, PCV valve and advance. Any help appreciated.