Need Thermostat Housing Info

I need to know what thread patterns are used on each of these portions of the thermostat housing. I believe that "A" & "B" are 1/4" BSPT but I'm not sure, I just know that 1/4" NPT doesn't seem to fit. "D" & "E" seem to be parallel threads of some sort. I'm trying to hook up my Auto Meter temp sensor and all of the adapters it came with are NPT and don't seem to thread in.

I just got my 280z the end of December and I want/need to be able to monitor things so I know I have a stable engine before I move on to some of the bigger projects on the car.

Replacing all of the hoses etc. has turned into a bigger project than I anticipated

Thanks,

Tim

Image taken from MSA site.