What do you mean by "four rail frame"?
Quote:
Originally Posted by fryco
Thanks for the feed back, I'm knocking around different ways to get better fuel mileage. The old slug only gets about 3.5mpg rolling down hill with a tail wind, mostly because of its methanol fuel. I guess the 4.56 rear don't help either. I just want to get it over 5mpg. I could simply switch to race gas and roughly get 4- 6mpg. Its similar cost per mile.... But, I would need another carburetor, blah blah, blah... With that mind, $1000-$1500 for another carb or $2600 for the overdrive??? Which I don't know if it will fit (My truck has the four rail frame)
p.s. I know you can convert carburetors back and forth for fuel type.
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