Quote Originally Posted by TyphoonZR
I would look at the carb first. You might want to change the power valve. See what's in it, probably a 6.5 if so, and if it is good ( check by sucking on it, place your tongue on it and see if it lets go or if it holds) go for a 8.5. If it doesn't hold vacuum, replace it with the same one that was in there. When cold weather hits, you need more fuel. Also, does the intake have exhaust travelling through it to warm it?
He say's the engine idles great.
If it where a blown power valve it would idle up and down.