What's the gvw of your LCF. On todays trucks the gvw rating is the combined weight of the front & rear axle ratings. Example, if the truck has a 17500lb. rated rear axle, & a 7000lb. rated front axle, the gvw of the truck would be 24500lb. Seems like it's the same with older trucks also. When I had my LCF's, seems like my 1964 L60H had a 7000lb. front axle, & my '65 L80, had a 11000lb. front axle.