i agree with Mike B, based on what i found in parts book and observed
3/4 Ton front spring looks skinny like a 1/2 ton
i don't have a 1.5 Ton, but the parts book say it is the same as my 1 tons
my 2 Ton and 2.5 Ton have something different, i can't share parts from them to my 1 ton
-s