I lucked out twice;my '54 GMC 2 Ton has a right side cylinder-type aux. tank,and I just found a '49 or so GMC cabover that has a LEFT side tank just like my right side one. They're 40 gallons each,which means,on my truck it'll be close to $400.00 to fill up from empty.(40 gal.X2,plus 18 gal.cab tank=98 gallons @$4.00/gal., give or take a little) I expect that to give me 800-1,000 mile range.For only a 2 Ton,this sure is a BIG truck! big_eek
Speed

1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck