I was a salesman in the truck and fleet department of a large Chevrolet
dealership in the middle 70s and the power trains available then were not only gutless they were huge gasaholics. I made a big mistake of ordering in a short bed 1/2 ton with a 454 and TH400 and a posi for a demo. It was fun to drive but I had to park it on demo row everyday with a 1/2 tank of gas in it and then watch every salesman in the place take their customers for a test drive to show them that you could still buy a Chevy that would still burn rubber. To go to lunch at noon, I would have to put gas in it again. I gladly turned it in when it had 5,000 miles on it and got chewed out by my manager because the back tires were bald:W.
Trucks are sooo much better today.
ArizAl