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Right off the bat I'm going to guess that you could have stuck turbo veins. This would for sure affect your performance.
I think he was saying 5k since he bought it. Cause he says 60k in the first post.
If you have the money look into a dashdaq for gauges. If not you at least need a pyro, trans temp, and coolant temp. I my self wouldnt worry about boost pressure just yet. Unless you are adding serious upgrades I dont think you would have to worry about overboosting. But if you want to go with 4 gauges that would be my next choise. If you get into doing alot of mods look into ARP head studs and egr delete or block off to slove the head gasket problems.
I personally choose the fuel pressure gauge before the trans. Of course I don't have a factory boost gauge, and because my truck is a DD - no towing whatsoever -, I thought the boost, pyro, and fuel pressure gauge would be the most logical for me. The trans temp, and coolant temp is on my list, but not just yet. need to put some change together.
Mods like that are really personal. I meant you know what you want to use your truck for, and that's what will make the choice of the mods for you. But the gauges are the #1 if you are thinking about more than stock.