probably, but I don't even know for sure..... lol. The one in my Duster is a shop motor or replacement from a parts store. When I bought it off of CL, it had never been fired. I took the pan off, valve covers off, and it truly was remanufactured (not that i'm a fan of shop motors.... lol). It still has the dished pistons :D I have 400 into the long block, then added my own intake, carb, and timing chain. I might be 750 from carb to pan?