51 F2 Engine Options

[redmodelt]

The truck in my avatar is a F2 48 with 226 with 3 on the floor (that's how my uncle ordered it). Mine at this point is my every day driver. It's not really a question of what engine you use but if the 51 has the same rear end, mine is 4.86, it really starts to wind up the motor any where above about 40. These are not high speed trucks. You might start doing some research into swapping out the rear end for a F250 1972 back with 4.11 gearing.
My carb sometimes leaks. It's is ether crud from the gas tank keeping the float valve open or gas boiling out from getting hot. You could be just having issues with the float valve. You might check that out and make sure it is sealing. Depending on the age of your fuel pump, you might also replace the diaphragm. It needs to be compatible with todays fuel.

[V12Bill]

Henry hated 6's and it took a lot of convincing to build one again. When the six came out in 1941, it developed more HP than the V8. The engineers purposely did not run the six up very high on the dyno and presented the partial dyno figures to Henry. Since the six on paper did not appear to be more powerful than the V8, Henry approved it. Several people have written in about how their sixes would beat V8s in drag races back in the day.

[FirstGenF2]

Originally Posted by redmodelt

The truck in my avatar is a F2 48 with 226 with 3 on the floor (that's how my uncle ordered it). Mine at this point is my every day driver. It's not really a question of what engine you use but if the 51 has the same rear end, mine is 4.86, it really starts to wind up the motor any where above about 40. These are not high speed trucks. You might start doing some research into swapping out the rear end for a F250 1972 back with 4.11 gearing.
My carb sometimes leaks. It's is ether crud from the gas tank keeping the float valve open or gas boiling out from getting hot. You could be just having issues with the float valve. You might check that out and make sure it is sealing. Depending on the age of your fuel pump, you might also replace the diaphragm. It needs to be compatible with todays fuel.

I planned to keep the rear end stock, im not concerned about going fast, mine has a 4 speed does that effect max speed?
I jist checked the shop manual no it just gives me a 6.4 granny gear, and keeps the same other gears.