Just fyi... I bought an engine from autozone exactly a year and one month ago. The warranty is for a year. We got a stock 69-74 short block. Even though I was away at college nearly 9 of those 13 months and it was rarely driven and has acquired maybe 1000 miles, we are experiencing a myriad of problems. The rear main seal is leaking, the valve seals and guides are shot and the engine is consuming oil at about 2 quarts every 150 miles or so, and the engine is pinging like mad. Furhter, autozone has offered no help via warranty/any other outlet, because even though the problems obviously originated long before the warranty was up, its past warranty.
So yeah. Don't buy from them and stuff. They suck.
So yeah. Don't buy from them and stuff. They suck.