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[907DAVE]

Originally Posted by fifity

Will bolting on a 38r do me any good without retuning? or would I have to get it retuned?

Your current tuning will work even better with the 38R, and no changes should need to be made.

Would I find more juice with an Adrenaline for half the money? Need retuning?

There might be a few minor changes that need to be made to the tuning to get the full potential out of the pump, but most likely you will notice a big difference (without any tuning changes) especially if you pump is getting weak.

Injectors are pricey...but I can always save up and get something in December...

Injectors are the next big jump for increasing power, but you must have the supporting mods first.

Its either some go faster parts or converting my dually to a srw...new wheels and tires, and a bit of body work on the bed...That might save me a mpg though? Maybe not, cause I would try to go with 35's...or 37's....how much of a lift would I need.

6''-8'' lift will clear 37's nicely. You can fit 35's with just a little valence trimming and a leveling kit.

How would I convert the speedo for the bigger wheels...

Superlift Truespeed

See Blue.