You NEED an EGT gauge before you do ANY fuel mods at all (moving the plate). Otherwise you have no idea how hot it's running. That usually results in melted pistons. Get gauges and check out the beginners thread here: Beginners Thread - Read First!
This should answer a lot of your questions about fuel and tuning.
Also, make sure the KDP (killer dowel pin) has been dealt with. There's info on that in the beginner's thread as well, or just do a search for it, you'll get a million hits.
1996 3500 ExtCab, dually, 4x4, NV4500, 4.10's, flatbed, 229K, gauges, BHAF, 16*, 100 plate, AFC mods, PhatShaft 62/65/14, 024 DV's, 3K GSK, CPP 7x.010's, South Bend 13" Con-OFE, 4" exhaust, dual 4" stacks
Last edited by Southtowns27; 09-29-2011 at 11:33 PM.