V vic marks New member Sep 5, 1999 220 0 0 Jan 17, 2000 #1 Don't know. I always got 10 to 12 mpg with a 4.11 and that is what I am getting with the GM at 3.07 + oversize tires. 4% larger. Is this with a 23 foot or 26 foot? 403 or 455? Imperial or American Gallon? Vic
Don't know. I always got 10 to 12 mpg with a 4.11 and that is what I am getting with the GM at 3.07 + oversize tires. 4% larger. Is this with a 23 foot or 26 foot? 403 or 455? Imperial or American Gallon? Vic
