1984 k10 - Frame Issue

[LF_MN_71GMC]

Bought this truck as a replacement beater/snow plow for my old rusted rig. I didn't think it would be worth fixing but it runs really nice and drives nice....well and I can't seem to leave well enough alone.

When I bought it I knew there was frame damage but it's going to be a plow so i figured, oh well. Now I'd like to fix it and would appreciate any ideas or thoughts on how to go about it.

Am I better off buying a replacement frame? There are a couple on craigslist locally I can get (rolling stock) for under 200 dollars.