Another Sad Story:

Had a friend buy one of the AutoZone "rebuilt" engines. He installed it over a weekend. When he fired it up, it had an engine knock. Went to the 'Zone and showed them....."no problem, just pull the engine and bring it back." He did so the following weekend and Zone gave him another motor.....put that in and it had a fatal problem......"no problem, just pull the engine and bring it back!!!!"

Duh, it didnt sound like the inexpensive solution to me.