Thanx for replying!!

1. Exhaust is not crushed or restricted. The Cat Conv. might be contribuiting, will schedule a replacement.
2. The thermostat goes in tomorrow, a lean mixture might be the reason.
3. Fan clutch will be the next item to replace, it rotates about a 1/4 turn after the warm engine is turned off. I hope I can find one locally for a decent price.

Thanks again!!