Later model tank in 58 ? (behind seat)

[JimDirt]

Does anyone know , or have they tried to put a 60-66 , 20 gallon tank in the stock location on a 58 ?? , will the filler neck work ?? , will the 60-66 sending unit work with the stock gas gauge ??

I was thinking about my reasons for relocating the tank to under the bed , which were mainly for a larger capacity , since when i do drive it , it will be in the 100+ mile range each time (to go dirt bike riding , etc) , fumes were a thought , but not the main reason , if i remember right the stock tank is like 15 or 16 gallons ? (yes/no ?) , so i was thinking if i can get a larger tank for behind the seat , i would rather go that route , so would a 20 gallon from a 60-66 fit behind the seat without having to move the seat forward any (i want the seat as far back as possible) i will still be swapping the stock seat out for something more "modern/adjustable" (bench seat) , or does someone offer a 20+ gallon tank made specifically for the 58 ??

I am getting ready to start to gather supplies to get the truck back going , and plan on starting on the work as soon as the weather starts to warm up and drying out (February) , i figure this change in direction is more practical than the prior route i was planning on , i will be slightly lowering the truck by removing a few spring leaves , and whatever i get is what i will get for drop ( i only want 1-3 inches anyway) , replacing or converting the steering box to something with no slop by either aftermarket or ???(Toyota ?? if so what year/model will work ?? , is this a easy/practical conversion ??) without re-designing the steering linkages , etc , and going to a tilt no shift column (but keeping the stock steering wheel) , replacing the bed wood , , at least getting the truck in primer for now , and of course get the engine back up to shape and in the proper location (which will include a new drive shaft) , and either completely rewiring the truck with a kit , or at least fixing the stuff that is worn and unsafe , disk front conversion and power booster conversion (stock location) , that is about it for the most part , nothing extravagant , just get it road worthy , fix a few issues , and enjoy the truck

Any help would be appreciated , as i think this is the best way to keep the truck as close to what it was when my dad had it , but still upgrade/modernize for driving safety/comfort

Thanks....Jim ...