In my opinion, the 400 motors got a bum wrap. They were good motors and worked well in work trucks. As far as numbers, I suspect many 400s were called 440s making it appear there were more 440 trucks then 400 trucks, but I bet reality is the other direction.
Back in the day, I had a lot of guys tell me they had a rare 2 bbl carbed 440 motors.
Yep, those 2bbl 440s were so rare you couldn't find tune up info for them.
By 78, any big block truck was a rare item, the perception was they were harder on gas then a 360 truck, but at least for me, I always got better gas mileage from the 400. The only 440 truck I had was a gas hog. Gene
