For around $25, you can get a thrush super turbo muffler. Go with either 2 1/4 or 21/2 size, the smaller will be quieter. I don't recommend the 2 inch size, just too small. Whatever the pipe size on these mufflers is the same size on the inside pipes. Another option if you want it dead and I mean dead quiet would Be a walker 21784 or it's lower priced equivalent. This muffler was used on all full size 1960s Chevys and many 1970s pickups. About $52 at summitt racing. The cheap version is 18293 at about $28 at summitt. Both have a 21/2 inlet and a 2 inch outlet the end of your exhaust pipe would have to be expanded to fit. No big deal. If you go super quiet I would spend the extra to get the 21784. If you want to run a bigger tail pipe Then 22329 is the same with a 2 1/4 outlet. Myself I would go with the 2 1/4 thrush turbo. The tailpipe will make it pretty quiet. Jay 6155
