Saml01/patsmx5, thanks for the quick replies. I'll put together a list of what I know and post it in the Megasquirt forum as not many will find this in the WTB section.
To get this started, I'll briefly explain what I know:
Everything seems to work great on the stim. The guages all move when I turn the *****. I lost the ability to control the coolant input from the stim when I did the mod for the parallel install, but it was working before that. From what I read, that is expected. Otherwise, I think it is all great on the stim.
I know that I had a lot of trouble building the parallel harness, much more trouble than I should have had. I built the entire thing backwards and had to scrap it and start over. I posted a thread to get some help and I'm pretty sure I ended with everyone's approval. That old thread is http://www.miataturbo.net/forum/t25529/
The only other area I could have really bungled was loading the msq. I used the MSPNP msq for the 96/97 cars without any changes except enabling the LC-1. When I try to start the car, I get nothing but cranking. I am really nervous about burning up those coilpacks that I didn't try it too many times.
I'm in a bit of a time crunch. My wife is coming back from Tokyo for Christmas and I'd like to convince her that I haven't been sitting around for five months.
I'll put up more details in a post in the Megasquirt section tomorrow. Thanks guys!