First of all, get rig of all the old fuel. Alcohol will get rid of remaining water. Acetone and rough shaking if one can remove the tank would help. One can also put rocks in there while shaking.

Find a nearby source for non-alcohol fuel-airport, Maverick sells non-alcohol fuel in CO, may be a similar source in your area.

Good luck,

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.