Where are all the running hot posts?

@YY1

YY1 said

Idle is set at book spec (IIRC 750 and drops to 600 with AC on).

Click to expand...

That's a lot of rpm drop, on A/C engagement;
what idle-timing are you running?
your refrigerant pressure may be too high.

Rather than the Idle-speed booster solenoid, you can achieve similar results by hooking your vacuum advance can to full-time manifold vacuum.