Need Help identifying 69 Chevelle Mufflers

[John Brown]

I have a NOS Walker chambered pipe stamped with the 2193 1 with a 5 below it. That pipe is from a Walker display they gave to auto parts stores in 1964. This particular pipe is the rear half for a chambered conversion set-up made for 1960 thru 1963 full size Fords, with all engines, six cylinder thru 352 (except convertible and station wagon. There is no mention whether or not it will fit a 390. Walker sold this pipe under their number CP2-5.