Yeah, from what I have learned the "big hole" in the pan was retained for the 4WD models as well as 2WD models. Cost savings I guess. You can buy a better pan for big $$ or modify or reconstruct if you are handy. Or just live with it. Another "buzz kill" for me is all the plastic used on the engine. I recently heard that GM did produce an aluminum valve cover for this engine in certain years and am hoping they offered an aluminum intake as well.

Apparently GM had no specific vision for other uses of this engine which is a shame after doing so much involved engineering to make it a success. Given the low cost when bought at the local Pic a Part type scrap yards and the advanced technology it still remains a very interesting option for a rod, for me at least. I am trying to come up with a sturdy manual trans for the 4200. I really want a manual trans for road use. According to folklore the manual trans available for the 4 cyl and 5 cyl models did not hold up to even the 5 cyl output and was eventually available only for the 4cyl. Two other choices are a Corvette man trans and a Supra trans, neither is a cheap option though.

So I am weeding through all the info I am able to collect and helpful advice is what I am hoping for.

Randy