Hi Carl - welcome!
I wish I could help, but I'm nothing of an engine builder myself and have a similar question. Just thought I'd pop in and say hi - hopefully one of these guys has some info to help us out. There are a couple of car build threads in the build section of the forums, and the guy (xboost90?) making the 87 944 may have pictures, info, whatever in regards to the oil pan. I haven't read through the entire thread but it looks like there is some good info there.