Noob with a K20 Burb

[Mojave K20]

Hey! Greetings from the heart of the Mojave.
Just signed up here. I have owned my '85 K20 Suburban since 94. Pretty much bone stock. It's a 4 speed manual, 4:10's, and a 350. I personally put 245,000 on the truck since I have had it. Finally have the cash to do a total rehab. A week ago today, I got the truck back from the shop after having a Goodwrench 350 installed since the original engine was just too tired. New front diff as well, bent to hell since I went into a ditch at 50mph in a sand storm. Next project is to replace the 40 gallon fuel tank since it has a major dent and cuts my fuel capacity. I am pretty sure I should be able to replace the tank myself. Any thoughts? I am also wondering if anyone knows if there is a tank shield or skid plate available for this vintage truck. The roads out here are very rocky and I want to protect this new tank.
After the tank, looking to rebuild the tranny and rear diff.