Ridecamp: [RC] endurance truck question- for mechanics

I know - not really endurance, except most of us do trailer to our
rides.  Least its not politics.

I have a '93 Dodge with Cummins diesel engine.  I've had to have the
tranny rebuilt (but I had been towing in 5th gear -my bad.)  I recently
heard of propane injection.   I love the idea of something that could
increase my mileage AND reduce emissions, but I'm a bit scared by the
extra torque.

So - mechanical opinions.  Would I be increasing my chances of needing
another tranny repair if I had a propane injection system installed? 
Any other negative side effects that any of you have encounted?  Anybody
know if any of the new pick-ups have propane injection as a factory
option.  

Thanks,
Teresa and Grey Moun, and Shade.

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