One (1) vintage way to make a fuel measuring wood stick for "any" vintage vehicle:
A. To avoid gasoline from climbing raw wood and providing inaccurate readings, with an empty fuel tank, incrementally measure heights in inches for each gallon of fuel added with a painted or varnish or tongue oiled non-marked wood measuring stick; or incrementally measure fuel heights with a metal ruler, metal tube, or some other non-porous stick or rod type material.
B. To avoid losing the measuring stick after it falls in a near empty future tank, obtain a wood stick at least approximately 3/4" wide x a minimum of approximately 3/8" deep, and cut said measuring stick such that at least 3-1/2" will be sticking out above the opening in the tank.
C. Because of rounded bottom tanks, provide a centered dull point on the bottom of the stick for more accurate center of tank readings.
D. Drill a hole in and near the top of this stick so the stick can be hung on a small nail on the wall .... it will always get lost in a drawer or cabinet, or on a shelf .... or when your wife thinks it is junk while cleaning and junks it.
E. Transfer measured horizontal marks on the unfinished wood stick and mark the measured stick with shallow horizontal grooves cut with a thin blade hacksaw; and,
F. Stencil in numbers immediately above horizontal marks using a small hammer & metal stencil .... or slightly indent and provide Roman Numerals above each horizontal mark with straight shallow chisel lines, such as I, II, III, IIII, V, VI, etc.
G. For easy future reading in dim light, or at night, color bottoms of horizontal cut lines and stenciled or marked numerical indentations made on the stick with a regular soft No. 2 lead pencil.
H. Provide two (2) coats of varnish, linseed oil, or tongue oil on the stick to protect lead markings and to avoid having a smelly fuel saturated wood stick in your garage or vehicle.
I. To avoid using the correct measurements during senior moments, identify multiple stick markings on front, back or sides of square sticks for different vehicles such as 1929, 1930, or maybe 1946 for vintage tractors etc.
Just one way to make a fuel stick ...... hope this helps.