I'll tell you one thing, I didn't get to drive it today, but I can tell the take-off is nowhere near what it was. But it did get better after we replaced those cracked vacuum caps he had on his carb.....even though gas dribbled out of the small vacuum port on the front of the carb after I pulled the cap off of it
He caught himself running about 70 more than once on our trip....couldn't do that with the 3.73's for any distance.....