Looking good brother! Thanks for the credit, but I screw up way more than I get right!
If it wasn't for this board I'd still be scratching my head and wondering what frame to use under the truck!
If you do decide to clean up the frame, pick up 3 or 4 40 grit flap disks for your 4.5" angle grinder from harbor freight. They won't get in the tight corners, but 90% of the frame can be cleaned up in a couple hours. Use your wire wheel for the tight areas. I discovered flap disks and composite wheels about 5 or 6 years ago... changed my life!
When it's all done, you'll feel better having fresh paint underneith. All that work should look nice!