I have had a running HOT condition for the past 3 years on a 68 GTO with factory A/C.
Thanks to this sticky the Goat is fixed, all my running too hot, puking out the over flow, especially with the A/C ON are now gone. The car has never run this good since I’ve owned it.
When all is said and done, I found a stamped steal impeller water pump, with a ¼ inch gap, impeller to divider plate, a bad clutch fan, and a leaking vacuum canister.
Thanks Geroge Kujanski ur the man!
p.s., I posted some pics in the lobby of my GTO.
This is kinda of a repost of the lobby, as an after thought it belonged here too.