Originally posted by rhickman
Really? I've never known a man that liked the 400m or the 351m. I had one, and it is truly the worst engine i've ever seen. A great idea though, a long stroke, big bore, great torque right... however no compression and was absolutely gutless.
The factory 400 was shot when I bought the truck. Replaced it at 155k with a used one from a '79 Lincoln Continental. Had more ponies than the truck version.
My dad used to use a '80 F-250 w/4. 10's and had 400. Never had any trouble hauling a backhoe on a tri-axle flatbed. Same goes for my uncle that had a 351M in his '80 F-250.
Worst thing with the 4. 10's in the '80 trucks was mileage, 5 1/2-8.
I had 3. 55, and got 11. My only complaint with that motor was that the carb needed rebuilt or to replace the 2 barrel with a 4 barrel carb. It had 165k on the motor when I sold the truck, and never used any oil. Can't say the same for the one I pulled out, 1qt/4-500 miles.
Originally posted by rhickman
... however no compression and was absolutely gutless.
The lowest compression I have seen on an old gasser was in a mid '80's Chevy /350. It was so low, you could turn the motor by hand by grabbing the flexplate.