Coolant leak.

Well, I'm getting things buttoned up on the 383 but today I noticed I have a little coolant leaking from the back corner of the passenger side head. I dont think its the header studs- it looks like its coming out from b/w the block and head. I guess I need to re-torque the heads or should I just pull it and try to see what the hell is going on there. Any thoughts? I used the MP steel shim gaskets and torqued the heads to 85 lb ft.
I have the same problem on my SB. When the car warms up it stops. I was told it was that pesky rear stud (I hope it is).