Matt, I have an American with a 232-2bbl and it idles fairly well in Park
or neutral, but when in Drive and after it has warmed up it runs rougher
than a corn-cob. If I give it just a little bit of gas, it seems to smooth
out a little. I will try your bolt torquing and WD-40 spraying before i take
the manifolds off and change the gaskets. I have a new exhaust manifold
ordered for the car as I hear a bit of an exhaust leak most of the time.
Thanks for your post. It gives me some insight into my problem and possible
solution.