I did end up putting the factory ford duraliner plastic bedliner in. after 225,000 miles my bed looked much better than my dads did. his only made it to 175,000 miles and both were close to the same amount of years. his was about ruste off. So I think the bed liner helped. I put new shackles and hangers on this spring. I actually just put deaver f31 leafs in yesterday and flipped the shackles. i also removed the block that went under the stock leafs. sits about exactly the same height as it did befor. i also coated the frame with a spray of oil while the box was off. I just got the coilover conversion done yesterday too. fox shocks. just got to order some for the back now.
2000 extended cab, 5.0 v8, 4r70w transmission, manual bw4406 t/c. 31x10.5x15 mickey tompson mtz on helo 15x8 chrome wheels. Coilover conversion, fox remote rez shocks, deaver f31 leafsprings, explorer 31 spline ls, 4.10 gears, leather mountaineer power seats and console