Increasing the power of the Detroit Diesel 6-71

[Boomer]

Your pinion seal is leaking pretty good, add that to the list.

[Audiomaker]

That's Neway air suspension. Usually rated at 46,000lbs for the tandem. Great suspension in that it has an upper trailing link that prevents torque up of the axle. The only draw back is the arms are low to the ground and getting hung up on a curb is not out of the question.

Your idea of making a stand up engine maybe the best. There was a mid engined motorhome chassis for using on garage motorhomes. It used a Cummins ISL at 450hp and 1250lb/ft torque. And actually, it didn't stick into the cab. The interior reminded me of a boat since there was a hatch in the floor for top of engine access. Good Luck,TomC

Walking around the truck checking my jacks.... look between the rears and yep... Neway casted in.   
The rear has a surprisingly soft ride...even by air standards.

[TomC]

If the front is just leaf springs, there is a two air bag (small) kit made that has a cab mounted valve that you can adjust going down the road. In this way, you adjust the pressure until you get the best ride. I'll be putting these on my truck conversion. Look at http://www.donvel.com/ Good Luck, TomC

[Oonrahnjay]

If the front is just leaf springs, there is a two air bag (small) kit made that has a cab mounted valve that you can adjust going down the road. In this way, you adjust the pressure until you get the best ride. I'll be putting these on my truck conversion. Look at http://www.donvel.com/ Good Luck, TomC 

    Thanks for that link, Tom.  Just what I've been looking for! 

[Audiomaker]

If the front is just leaf springs, there is a two air bag (small) kit made that has a cab mounted valve that you can adjust going down the road. In this way, you adjust the pressure until you get the best ride. I'll be putting these on my truck conversion. Look at http://www.donvel.com/ Good Luck, TomC

Yes it is.  The ride is actually pretty good as stands. On it's maiden-to-me voyage, I drove 900mi without any discomfort on pretty hard non-air ride seats and was surprised.  I suppose you bus guys are used to it, but the front seat ride is a little different sitting a good 3' in front of the axle.
I have a set of air ride seat bases I pulled from a toter I used to own prior to selling it.  Those will be going in once I have decent seats to go with them.  The link you provided has an "anti bounce attachment for those, so thanks!

We'll see after awhile if I want to do some mod's to the front suspension.  I have often toyed with the idea of semi-air in the front (removing about half the springs and installing bags (which I also have extras of).   As for "control", I'm not really having any issues... I'd hate to introduce any.  The big old thing tracks pretty straight even over rough highway.

What I *will* want to do is get under there and see if there's maximum travel limit on the steering (that's adjustable).  A little tighter turning radius would be great.