Both the 1986 B2000 and the 1987 B2200 have the same gear ratios according to my repair manual and the owner's manual. The 1986 had the carburetor and header mods in early 2000, and showed a very noticeable improvement. Engine had 130.000 miles at the time. Now has 190,000 miles on engine, biggest problem is occasional carburetor icing.
1987 B2200 was intended to replace Ol' Reliable. Engine was professionally rebuilt 20,000 miles ago and carburetor and headers installed at that time. Emissions plumbing has been recently removed as an experiment, but mileage hasn't improved, nor has top speed. Town mpg is 19-20 and highway is 23 compared to 25 and 30 for the older truck. B2200 will not exceed 4,000 rpm in 5th gear. Thanks,
Will
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Thursday, February 22nd, 2007 AT 8:11 AM