1997 Allure remodel

[Beach.bum]

Hi. We are considering purchasing a 1997 36 ft Allure with 110,000 miles on Cummins 325 HP. Most things seem to be original, and although they show age, nothing shows neglect. Unfortunately, there is not a lot of maintenance history available.
The coach has the great room slide, which appeals to us more than the kitchen slide in newer units. Aside from some interior color updates, we know we need to factor in some mechanical work in order to travel with peace of mind. I am expecting to address the following things, but would welcome any other suggestion/comments regarding taking on this project.

Has PTO been upgraded to wet design?
Replace all air bags and shocks.
Full chassis inspection
Service transmission
Service rear end
Flush radiator
New tires and batteries
Engine oil & filters. (Unfortunately, Cummins said there is no option to increase HP on this engine)

Goal is to have a safe and reliable unit for two people and two dogs to enjoy on a 3-4,000 mile summer trip then shorter adventures until we are no longer able to travel.

Thanks

[153stars]

Those old mechanical injected motors are easily uprated by altering or aftermarket throttle plate and adjustable star wheel. "Google search it" But EGT and boost need to be monitored . As well as carful calibration/tuning not to over fuel. Anything past extra 25-50hp is likely to do more harm than good. 325hp to weight of rig is probably real decent ,the final drive ratio is setup for sweet spot.