These guys are IDIOTS! I took a Ford 4.2L for an exchange. They pulled off the main bearing cap braces, not even realizing it wasn't the exact same engine (Ford changed this engine mid '97). I was able to work around that. I flipped the engine over to install the intake, and it doesn't match up to the heads. I told the guy that there were 2 versions of this engine, but he was a "know-it-all" who swore it was the same. I will never do business with them again, and would never recommend them to ANYONE!