Originally
the muffler on the cars above was mounted directly under
the drivers seat. Not only is this a hassle to remove and
replace, it puts a heat source right next to the floor.
This is made more dangerous by the rat-hair mat Nissan
used as insulation. It collects departing engine oil into
a nice basis for a future fire disaster.
The
69 cars were converted so that the muffler was mounted
farther back, just in front of the rear axle. The front
pipe that connects to manifold, and the rear resonator
are the same on all cars. The center pipe was changed, as
was the muffler, which now comes attached to the axle
"hoop" pipe. As long as you order the muffler and hoop,
and the center pipe, you can hook up to your original
pieces.
All
of the hangers remain the same on both
systems.