Brian, running that combo works real good. The turbo's lite fast, reducing the smoke.
Are you seeing 35-45 lbs within seconds? This is a good thing, and makes the truck fun to drive.
I made 708 with the same twins, 3.5's and dual pumps. This with the Smarty beta 4.3add the TST you may touch 750
Rob
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2005 3500 HO, 6sp G56,
1999 2500 CTD 4x4