I bought my 350 pontiac from Autobohn engines off of ebay, Now ,I don't know alot about engines and the engine i bought runs good BUT i had some issues when i installed it. I bought a complete engine minus carb rebuilt by them,i didn't tear down the engine when i got it to verify they installed what they listed but thought i would take off the waterpump to check clearances.the divider plate was corroded thru and the 2 little water tubes ( can't remember what they are called) were not installed.Glad i took it apart.If i had to do in again i wouldn't buy from them, they should have seen that if they are professional !