welcome to the bolt... where in "west texas" are you at?

my 44 1.5 ton is about 22' long with the bed weighs in at around 6000 lbs (guess-tamate)

most likely gas tank is under seat...

I asked a similar question to the split rims question a while back... search for my ID and you should be able to find the thread... I just went ahead and replaced the tires on the split rims at a local truck tire shop that was used to dealing with the split rims... 8.25 by 20 tires cost me about 130 a piece.

-Mike R.