Exhaust mainfold and downpipe connection

[dzwestwindsor]

Hello,

I have a 71 chevy c20 with a 350

According to the inspection station, I have an exhaust leak. It's pretty obvious because the downpipe connecting to the exhaust manifold can be pivoted and moved around a little, since the bolts holding it on aren't tight.

This image (found on another thread) shows the connection between manifold and downpipe: http://67-72chevytrucks.com/vboard/a...1&d=1341063890

However, I'm having trouble getting the bolts off- they are essentially fused together because of the rust. So before I spend more time trying to get them to move, I'm wondering if there's a gasket in between the manifold and the downpipe, that i would need to order? I want to order it before hand so I can save some time, but I'm not sure if a gasket even goes in between there?

Thanks

-David