yeah the 2g will have a little hump on the top right side of the manifold vs. the 1g doesnt. I am sure someone could post a pic of what I am talking about. the hump is where the heat sheild bolts up to.

 

Here is a pic of a 2g manifold off ebay. The bump on the drivers side (first cylinder) is a visual giveaway. :tree:

 

There is also "webbing" as I think of it, between the runners on a 2g, similar to what you would imagine a ducks foot looking like. Congratulations, everytime you see a 2g manifold you will now imagine a damn duck .

 

here you go....
http://www.vfaq.com/mods/exhman.html