Exhaust Studs, what torque?

["schab932000" <schab932000@xxxx>]

Thanks for everyone advice on romoving those exhaust studs. In 
the end, it was a combination of a lot of PB Blaster (like liquid 
wrench), a stud extractor (looks like a normal socket, but with 
spiral inners that grip onto the stud) and a propane torch. I did 
buy some freezer spray as well, but I think the torch never got 
things hot enough to take advantage of the spray.

I ground down the manifolds to smooth the gasket surface. 
However the edges are rusted pretty good so I can't take them 
down without loosing a bunch of steel. Some areas around the 
exhaust holes have only about 1/4" of flat contact surface to the 
gasket. Is this okay?

Next question, when putting the new studs back in, do I just hand 
tighten them and when I eventually put the manifold and nuts 
back on, will it set itself. Or should I double nut the studs and 
torque the studs in, remove the nuts, then put the manifold on 
then put the nuts back on?

Finally, what torque do these studs need to be at.

Thanks again,

Pat 
vin5552