Bought a decent used bed for my 87

[chevymotocross]

I bought a respectable solid 6.5 foot fleetside for my 87 locally for $300. The bed on my truck now, has a severely rotted cross brace, tail pan, and the entire left bedside is now rotting away in numerous sections. Instead of repairing my bed, I was better off buying this solid used one. I will post some pics tomarrow

I am going to have the bed prepped and painted by a respected local body man.

I'm not starting the project until spring (too cold in CT!), but I have some things to do while the bed is being prepped and painted.

I have had great luck with Zero Rust on rusted parts. I was going to sand down the frame while my bed is off and apply zero rust. Will zero rust work well on the frame or is there a better product out there for frames? I was also going to coat the entire underneath of the new bed with zero rust. Is this a good or bad idea?

I'm not going to have the body man spray the inside of the bed. I want to have it coated with bedlining material. A local company specializes in this. Their work comes out well but it is pricey at about $300. How are the DIY liners?

While the bed is off I will also be installing (FINALLY!) a lowering kit. I have decided on a 2.5/4 kit. I hope my 255/70/15 tires don't rub.

My truck is a dual tanker. The bed I bought is also a dual tank bed. My drivers side tank I replaced last year. The passenger tank leaks. I don't drive very far, I think one tank will be fine. I would replace the passenger tank but the supports are completely rotted, and if I am going to replace that tank I would also put in a new fuel pump. This just adds to more money towards the project for something I probably won't use often. Is there any harm of removing this tank will my bed is off, and keeping it off? A tank I guess could always be added later if need be, it would just have to be installed.