General: Backfiring by Vince Knauf
Emissions: Passing Emissions Test (for High Mileage Type I Engine) by Fred Stoermer Emissions Testing by Bill Abbott Adjustments to Pass Emissions Testing (Fuel Injection) by Dennis Haynes Emissions Testing in the UK by Bob Wallace
Mufflers and Hardware: '72-'79 (type IV engine) Bus Exhaust Permutations by Ron Salmon Type IV Engine ('72-'79 Bus) Exhaust Leak by Steve Dolan and David Schwarze Type I Engine Exhaust Leak: Muffler Flange Installation by Ken Hooper