My 1991 Ford F-150 has the 4.9L straight 6. It was given to me from my uncle with 85,000 miles on it. It now has 187,000. I have not changed the oil since i got it and it still runs very strong. I'm not too big on the transmissions on the 91 Ford since my reverse went out.
I recieved it from my grandfather when he passed away. I love this truck. It currently has around 69300 actual miles. It is a great truck. It has the 4.9 with the HD tranny out of the 350 and the same HD rear axle out of a srw 350. It was ordered like that and is not aftermarked mods. This thing is a torque beast. I put 30 by 9 inch BFGoodwrench allterrains on it at stock ride and I can go farther than my friends Jeeps and 4X4s and its rwd! I frequently haul 2000lbs+ in the bed and a 6000lbs+ trailer and it will handel it at any speed and it has 0 lag even fully loaded. #5 cylinder is shot though but still drives OK.
Massive torque beast. Reasonable gas mileage for a truck. Durable as a block of solid steel. Goes anywhere. Comfortable as a new lazyboy.
Better brake design and maybe rear disks. Better factory fuel pumps and guages. Cheap fender material rusts so easily. Bad gas mileage because of bad cylinder. More power
I have a 1991 F150 Custom std. cab 2WD 4.9L L6. I drove it to school and back 5 years ago the only problems I have had was the water pump, heater core and replacing tires (me being a 17 yr old boy). I would definitely buy another truck like this, but I would like the 5.0. I suggest this truck to anyone. I had 155,000 miles on it when I bought it and it has been a great truck.