Im looking into buying my first diesel, but I've heard these trucks are plagued with issues. the guy with this truck told me that the upgrades he has done pretty well fixes all of those issues, since I don't know **** I was hoping someone who does know could help me see through the BS if in fact that is what I'm being fed. Thank you in advance, anything is appreciated. His description below:

1995 GMC 6.5 Turbo Diesel 4x4 Auto Trans, New pensacola diesel injection pump, Pmd relocate to front bumper, New pensacola marine injectors, Custom chip from Heath diesel, New Heath diesel glow plugs lift pump oil pressure sensor, k&n intake, 4 inch exhaust 2 1/2 inch crossover pipe 5 inch powder coated tip black, 18 inch Rockstars with general grabber tires, Kenwood cd/DVD flip out radio, Cowl hood, 35k Hids, 155,xxx miles
Asking $7000 OBO