You're better off buying a crate engine from a place like Jegs, Summit, etc. I bought my 440 off craigslist and the person told me the engine was just rebuilt and gave me the receipts from the shop. Well I had the pull the oil pan off to put the correct pickup in it, I then noticed the rear retainer was cracked and the main bolts were not torqued down. Then I found some "crap" in the engine itself. I ended up taking it to my engine shop and had it tore down and there were all kinds of problems. I ended up spending another $2500 having this engine redone correctly. So I went back to my receipts, and called the previous shop and of course, they were no longer in business. I wonder why. Either find a reputable shop to do the work or buy new.