I bought my truck about a year ago, with a little over 100k and desperately behind on maint. ( at least former owner did change the oil!)
So far I have done the following:
replace fuel line with parker push lock hose
upgrade convertor and valve body
COMPLETELY rebuild front end ( all moog parts!)
ordered TST dowel pin fix kit today.
and of course, changed all fluids, belts and hoses. (oops! forgot transfer case)
Ran overhead and adjust valves.
Anybody have any suggestions of common problems at this mileage that I should check/ address??
Have a vibration problem, some one suggested leaf spring bushings. Which is actually my next question, I do need to do something with the rear suspension, springs are tired, should I replace with factory type and install overlaod springs? Or what else is tried and proven? I pull a gooseneck horse trailer, max of 12k. I am running 18" e rated tires.
Thanks for any suggestions, this is my work in progress, once all mechanical issues are straightened out, I have an 01 4 door cab sitting here to swap onto it. A 97 4 door 12valve!

 

fuel filter and pre-filter

 

changed fuel filter and eliminated fuel heater when we changed the fuel lines. In preparation for FASS later on.....
Also, I guess I should mention I'm just looking to stay ahead of common problems, once I get it right, it's going to a shop for power upgrades. larger turbo, time pump, and so on

 

i ordinary fass wont handle the p-pump you need to have 30+ psi or better for good performance. so i would go with an airdog

 

Unless your going to be off road competition truck and need a lot more fuel volume , I do not think you can beat the cost , long life , reliability of the stock lift pump .
Your talking about pulling trailer , and regular driving , I would look at the front end up grades , I have the SolidSteel steering brace & the larger adjustable bar .
I do not remember when they went to rear disk , but if still drum , the GM larger wheel cylinders , then what about an exhaust brake , again pulling horse trailer - don't forget the 60lb valve springs .

 

Once I am finished with "maintenance issues" and a little more power, drop on the 4 door cab, I am going to switch over to the new style front end, find front axle from 01, swap to newer steering design and bigger brakes, already have 18" rims, so larger rotors will clear.