When i was at the parts store pricing new coils for my C10 (which are the same PN for C10's and 20's, like they say) i asked about putting HD springs on the back so it wouldn't sag so much when i loaded my 4wheeler in the back. They said that it would stiffen up my ride alot. So, yes it should make your ride softer. Also, i have the HD rear spring option on my truck, but they are very old and weak. Would the HD rear spring simply be 3/4 ton springs in my 1/2 ton, or something like a 5/8 ton? lol.
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Lucas
"Another proud owner of one of the coolest trucks ever built"
drop_shift@hotmail.com
My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383.