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.