The Stovebolt Site Forums The Shop Area Engine Shop William's, a Fenton knockoff and a poor product.

To continue this conversation, I would like to see some pictures
of the passenger side pipe where it crosses under the transmission.
The one that National Chevy Assn. sends with their kit blocks
off the drain plug on the SM420 and actually hits on it if you
try to raise the muffler up level with the driver side.
Also the passenger muffler falls behind the driver side by
nearly half its length.
Tail pipe on the passenger side had to be cut off and re-swaged
to fit inside the glass pack muffler. The tail pipe on the
driver side had to be extended roughly eight or ten inches
to reach the muffler.
Denny Graham
Sandwich, IL