JTK wrote:You might want to drop the skid plate to help you out.
The oil pan is alittle funky looking on the isuzu 3.2/3.5L's. The engine has an aluminum lower skirt or 'lower block' & at the lowest point of the skirt is a small black stamped steel oil pan. It has a large hex head facing towards the driver's side. I think it is 7/8" as you say. Be careful not to drain the trans pan on your 4L30E AT as it has a big hex drain plug facing straight down on the larger of it's two pans.
frankhad wrote:Underneath the car about where the oil pan would be, I see what appears might be the correct bolt, but it has a tag on the casing which says Toyko Radiator Co.