Just bought myself a muffler/exhaust from BOWOW, and it doesn't fit. It
lines up with the heater boxes fine, but trying to tighten the nuts on it,
the muffler jams against the steel tubes coming down through the tin to the
heat exchangers for the interior heat ('80). I checked with the parts guy
and and he says that muffler should bolt right on and they have sold it for
years. The system that was on this van was the one with the crossover pipe
and cat (US federal style). I brought the van from the US, so did they have
shorter heater boxes to allow space for the crossover pipe?

Nathaniel