I took yet another good look at the underside of the truck, with a decent light.

IMG_20190215_001222451.jpg

IMG_20190215_001155592.jpg

The rust in front of the mud flaps is only really surface rust, but from there back is full on Titanic.

It looks like that entire section is mostly straight though, and the rust isn't as widespread as I originally thought. I can just replace those sections with rectangular tube on both sides and build new spring perches.

I'm feeling better about the rust situation, which is funny considering those two pictures... Lol