1987 B2200 with 20k on rebuilt engine, header exhaust and Weber 2bbl carb. Will not exceed 4k rpm in 5th gear, but will go past 4k in all other gears. Top speed about 83. Mileage around 23mpg highway. I have a 1986 B2000 with the same mods, 170k on the engine, that gets 28 mpg and tops out at 97mph. any ideas why the newre truck doesn't get the same performance? Thanks
Feb 20, 2007 at 7:32 PM