jegs a body exhaust system

I have been looking for my Swinger. I found a 2 1/4 kit for 340 manifolds. Dou you have a 340 or 318?

383. I have the old exhaust but it looks like its 2" - 2.25". If I get stuck I might use them and add adaptors to the new 2.5" system for the rest off the year.