340 No low end power

Badart, south end of the valley, Herriman. If I can't figure it out Ill have you up for dinner and see if we can fix it! :)
It is a 340, Double checked checked tonight, got me worried! Not sure on the rear end, no cover, looks like you drop the drive line and pull it out the front? Tried wheel/drive line trick and it driveline turns only 1.5 times, wheel once? Neutral or in gear? Used a can of carb cleaner, no vacuum leaks anywhere. Will check timing this weekend.

Next time that I am in that I am in that part of the valley I may take you up on it. Sounds like you have and 8 3/4 in it. How many rpm are you turning at 60 mph? Like these other guys have suggested, I would start with the timing and go from there. Crackedback knows his stuff and he is right altitude likes timing.