00 Silverado Z71, 5300, 5 speed, 3.73 gears - 17-18 city, 20-21 HWY
'69 C-30 Car Hauler, 396 4bbl, 4 speed, 3.73 gears (weighs 8200 lbs unloaded
) 6-7 City, Maybe 8 HWY
67 C-30, 292 L6, 4 speed, 514 gears, Don't know but it can't be too good with those gears!! Hoping to get 20+ with the 6.2L Turbo Diesel I am installing!
67 C-50, 366, 4 speed, 2 speed rear, Have no idea on it either. Its not as bad you would think it was though.