I have an old 300 6 with a stock one barrel on it. What would it take to get this thing to run off of E-85?
Carbs are harder to deal with because of the mixture. I've been playing with E85 in injected and electric carbs, but the old set and got carbs, not so much. Since it can't adjust on the fly, you have to dedicate it one way or another, or risk getting the mix off and either running lean on E85, or rich on regular gasoline, or even E10. Basically, you would have to have larger jets along with an updated carb kit. Many of the carb kits being sold these days are alcohol safe. The old natural rubber and cork kits are not able to take the ethanol.The reason many have already been updated is that E10 will do much of the same kind of things the E85 will.