Collected/trade parts over the years. Ended up going with a complete exhaust setup for my 69..
Any interest let me know..

Have a set of 400 RAM AIR head pipes., for long branch cast iron (69 T/A) New never installed w/steel flanges, not cast.
1. Cross flow muffler (not clean case-w/spot welds) New, never installed. (see dimension specs)
2. Cross flow muffler, New but had a weld in '4th' port/flange (see dimension specs) Not Gardner, but a decent muff!
3. Walker turbo mufflers (2) (see image/sized to fit specs) 2 1/4 x 2 1/4" Flanges. Run for a few miles, but very clean.
4. Xlerator turbo mufflers (2) (see image specs) 2 1/4 x 2" flanges