Will your truck be loaded or empty?
My 1957 Fire Engine weighs 14,400 with out any water in the tank and with a 200 hp V8 I drop down to about 40-45 mph when topping out on a long grade and that's if I hit the grade doing about 65-70 mph first (7-8% grade 5 miles long). Things really drop off fast if I have to tap the brakes for any reason.
Mike B
