Threads in oil filter housing

[asshanson]

I just installed mine tonight, and my prosport oil pressure sending unit screwed right into my filter housing. Not sure exactly which year housing I have though (it's forward facing). The threads on my stock sending unit were identical, and since my stock gauge never worked, I just replaced the stock sending unit with the aftermarket one.

But I have a question, what is normal oil pressure at idle and/or higher rpms for our cars at the filter housing? The gauge only goes to 100, but I think I was seeing something like 70 or 80 psi at idle when I tested it for a second.

EDIT: fyi, the motor was cold, and I don't have balance shafts.