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722 Posts
i have a dualie w the same set up 411s and manual with that little bit of tweeking your truck should wanna run pretty hard ...my truck is basically stock with a couple of things moved around...run the truck up to 2400 to 2600 thru the gears and if 4th falls flat ck your fuel pressure ..Big Time..my truck will burn rubber in 1st and spin them in 2nd on cold pavement and pulls like a gasser in 4thalmost making u lite in the seat
