Finally getting around to my list. Better late, than never I suppose.
I have th BD extractor muffler on there now - it was great two years ago when I first got it, and it has held up far better than the EMPI quad tip I (and every bus driver) had used prior to BD releasing a "better option". That said, it is notorious for making the bus sound like it has a miss, lovingly dubbed "hiccups". I'm tired of the sound and decided it was time to go back to stock.
I picked up a complete exhaust at Camobelltown, which while in useable shape - wouldn't have been for long. I was more interested in the "crossover" which links the two exhaust/heater boxes. It is the only part you can't get new. I bought the new collector (the "U") as well as the CAT delete, muffler and tailpipe.
My gas pedal sticks, or more like bunds. So, I am replacing it with the FastFab pedal and the Buttys Bits balljoing linkage kit. Eliminating the pushrods, tophat and the angle stock that magically makes the pedal work now.
The pedals:

I originally bought the polished aluminum, then found out there was a black version. So, went for that instead. Then, found out to return I'd have to pay shipping and a restock fee - not wanting to pay $30 to get the balance of $50 back, I figure I'll list the aluminum one. If you want it - lemme know. Word on TS is it is idea when upgrading the linkage.
http://www.buttysbits.com/throttle-kits.html
Then, recovering the rear seat - the mattress cover will come soon. I think I'm going to do the bottom of the mattress in vinyl rather than fabric too.
Replace the canvas, and install the hinge guards to protect it.
Add the front signal repeaters on the door reflectors and convert the rear side markers so they flash along with the directionals to add visibility.
Then have to replace the headlights - I was told by the funeral home mechanic that they met make the bus fail inspection since the chrome reflectors inside them have turned black... Dunno. But an easy fix. Looking at Cibies from Daniel Stern Lighting.
Also debating getting my Berg Finber Grip shifter converted to a bus model. I bout it for Reise but never installed it in anything. It's been hidden away for the past however many years. I'm just getting an inch to use it.