what are the common problems with...

I am thinking about buying the following truck:
1991 F-350 Crew Cab w/ duel rear wheels
fuel injected 460 V8
153k on truck
Has Banks power Pak system installed approx 2.5 years ago
Trans was rebuild approx 3 years ago has banks trans comand
motor is still running very strong
rear suspension has HD springs w/airbags and on board compressor setup from in cab
HD trans cooler w/fan
trans temp gauge
tires approx 2 years old front rims same time
has *********** over bed in bed toolbox
front bucket seats out of a 2002 dodge dakota
cruise
ac,
power windows,
door locks
5th wheel hitch
passed smog 2 months ago no problem
I relize this is all subject to my own verification, but I have owned a 1995 F-150 with the I-300 and Put over 200k miles with no problem on it, and I currently own a 83 f-250 with a carbed 460 with 90k miles on it and have had very little trouble with it.
Just wondering what Kinda problems this engine/tranny combo may have? Were there different Auto trannys available? The current owner has had it for about 5 years and tows a 30' toybox about once a month.
thanks




