I've had my truck to what I would estimate at 110mph. The speedo goes to 85 and the needle was straight down 
My tires are BFG 295/50-15...H rated I think.
Had it in drive and the rear is geared 3.08
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 Marc Cook
1986 Chevy Silverado C-10 LWB
Gunmetal Grey Metallic
5.0L HO, 700-R4, '73 12-bolt rear
Long tube headers, 2.5" dual exhaust dumped before the axle.
1988 GMC Sierra SLE 4WD
5.7L, 700-R4, stock everything
6000LB winch
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