Farmall 400 repower

400/450seriesmn · May 28, 2015

I was wondering on my 56 farmall 400 if I could repower it with either a 221 or 263 6 cylinder and if it would fit or would I need to make or buy different frame rails to make it fit

DeltaRed · May 28, 2015

You can do about anything if you set your mind to it....I would say yes,you will need to 'stretch ' and modify the frame rails.

DeltaRed · May 28, 2015

BTW,I once saw a 450 with a large(from an F-8 Ford truck) flathead V8 in it. Got to hear it run,Even got to drive it around the guys yard

kub6040 · May 28, 2015

Just a dumb question , why put a 6 in place of a 4 that is
a proven horse , the 263-301 will have more horse power
but at a higher rpm ,but you will loose your engine driven
hydraulic pump . If I were looking for more power I would
add some in the 264 block , it's there just turn it loose!

400/450seriesmn · May 28, 2015

(quoted from post at 21:19:06 05/28/15) Just a dumb question , why put a 6 in place of a 4 that is
a proven horse , the 263-301 will have more horse power
but at a higher rpm ,but you will loose your engine driven
hydraulic pump . If I were looking for more power I would
add some in the 264 block , it's there just turn it loose!

It runs fine it has the overbite to crank it up to the 281 power but it needs a head job and I was thinking about turning it into a puller with a bigger motor.

gab · May 29, 2015

Used to be 4 or 5 around here years ago with Olds. v/8's in them, think there's still one down the road a few miles

ejr-IA. · May 29, 2015

put a IH 345 v8 truck engine in it they fit have seen them.Also use IH 706 frame rails and bolt a 6 right in.

PretendFarmer · May 29, 2015

(quoted from post at 05:22:39 05/29/15)

(quoted from post at 21:19:06 05/28/15) Just a dumb question , why put a 6 in place of a 4 that is
a proven horse , the 263-301 will have more horse power
but at a higher rpm ,but you will loose your engine driven
hydraulic pump . If I were looking for more power I would
add some in the 264 block , it's there just turn it loose!

Click to expand...

It runs fine it has the overbite to crank it up to the 281 power but it needs a head job and I was thinking about turning it into a puller with a bigger motor.

You may want to check with whatever club you want to pull with. Some of them either wont let a frankentractor like that pull, or they put you in a class with only frankentractors which usually limits your competition. But that depends on the area and club.

Janicholson · May 29, 2015

Remember that the reason the differential and finals had issues with the 460 and 560 was the increased power of the 6. Jim.

CenTex Farmall · May 29, 2015

I would say that is a question of durability vs. ultimate strength. I agree that for a re-power like that the trans and final deserve more than a casual examination. One could certainly upgrade the bearings.

David G · May 29, 2015

Guess my MH EFI would fall into that class.

Central Illinois · May 31, 2015

My wife's grandfather built this one with a Lincoln engine. I've had it torn down for a few
years now. Someday I am going to go through it one end to the other. When I had it running
when you would crack the throttle you had to hang on.

Farmall 400 repower

400/450seriesmn

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