More info on the truck is needed. Has it been converted to rear wheel drive? Are you using a conventional radiator cooling system or an ice box? Have you already moved dead weight to the rear by putting the battery in the bed? Have you scaled it to know weight distribution of the vehicle?
I'm sure you've already done most of the race car mods but us knowing what you have will give us a better starting point.
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-Mike
2007 Ford Focus ZX5 - 91k - SGII, pending upper and lower grill bocks - auto trans
1987 Monte Carlo SS - 5.3/4L80E swap - 13.67 @ 106
2007 Ford Focus Estate - 230k - 33mpg - Retired 4/2018
1995 Saturn SL2 - 256K miles - 44mpg - Retired 9/2014
Cost to Operate Spreadsheet for "The New Focus"
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