Need thread size/pitch for...

[joeydurango]

Working on my truck today. The t-case shifter has been wobbly as of late, and I've pulled the seat and carpet (other work to do while I'm at it). I'm running a new 4L60 in my '72 K10, along with my NP205 t-case and an Advanced Adapter between the two. Turns out the bolt that's fastening the shifter to the adapter was really loose and way too long - looks like someone just threw something (probably wrong) in there at some point. My question is - does anyone know what the thread size and pitch are supposed to be for that location on that particular adapter? It's a pretty tough spot to measure it while in the truck, and I'm not sure I should trust whatever measurement I could get anyway, since it seems to be halfway clapped out. Hopefully someone has one sitting in their garage for easy measurement! Thanks in advance!