Peter,
I actually did this a few years ago on a 76 B. I used a Walker catalytic
converter (can't recall the part number). The converter inlet and outlet
were the correct size for the B exhaust. The converter measured a total of 15
inches. I did just as you said: cut the pipe just in front of the forward
muffler, slid the converter on and welded the joints up. The installation
looked just like a factory deal and the inspector didn't know the difference
either visually or technically since the car passed the emissions test. The
converter cost about $115, but I have seen them for about $70 since then. I
didn't add any insulation but it did get a little warm(er). But, what's the
difference between very hot and very, very hot in the summer time?
Good Luck!
Eric
|