I saw a recent posting from someone with an '88 38 foot Regency like mine but I can't find it now. I want to know what temp it usually runs at.

did you try a search for "3208 Temperature"?
Maybe the thread pertaining to Nick will help you.

My 3208 is the ATAAC 300HP version. The water temperature runs a constant 175-180 degrees. Even in the mountains I seldom see 200 degrees. The transmission temperature runs about 190-200 but will run slightly higher when the torque converter is unlocked and the transmission is experiencing some slippage.

Nick

Thanks

It ran a bit cooler after simple cooling system maintenance.