Quote:
Originally Posted by hotrodfeguy
4.11's are the killer almost anything is better than that. I swapped from 3.25 to 2.75's in my 77 with a 351M and it was a lot better. I think by looking at your engine there you have a 351C or a 351M either way the MPG is in the rear gears right now. I would even leave the trans alone for now. Go with anything but the 4.11's good GOD mate !!!  |
Right on Sir...I too have had several of those older F-series pickups and that is definitely "NOT" a Windsor series motor. The first indicator is the placement and position of the Thermostat housing...dead-give-away that it is the 351C/351M/400M series motor. Second look-see is the corner of the head next to the valve cover, if there is an "M" stamped there it is generally a 351M/400M, if there is a "2" or "4" stamped there then it is usually the 351C. There are variants if someone swapped the heads out etc etc. More if needed.
:{)