1972 Demon 340 engine mods

if the Demon had stock tires E70-14 the OD would be around 26 inches, if you go to a 27560R15 tire the OD will be 28 inches. That would make your gear ratio more like 3.00 instead of the original 3.23. Using a taller tire drops your gear ratio.

26"/28" = .92857142857
.92857142857 x 3.23 = 2.999 or 3.00 gear ratio

that's going to make your car slower off the line