| These are notorious for going bad. I had an over heating problem too. I replaced everything and even replaced my fan clutch with another used one. Then the legend Greg Dupree convinced me to get a new fan clutch. Amazingly it solved the problem. Your hesitation problems and backfire sound like another issue. I agree with Zinister that your timing may be off. Since you got a used motor it may be a good idea to pull the timing covers and make sure the timing belt didn't slip.
"Being forgotten is worse than death" "The penguines are slowly, but surely stealing my sanity"...."sprinkles" "The ricer isle is equivalent to the feminine hygiene product isle in the grocery store...real men just don't belong there." BradZ (FL)
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