farmall 400 motor

Anonymous-0 · Oct 18, 2012

i have a ih 400 block (c264) that i want to put in a farmall m. my plan is to put the 4 1/8 fire crater overbore pistons from hy-capacity in this c264, will a 8060 head off of a farmall m fit or will the pistons hit the head? any advice would be helpful.
thanks, alex

Janicholson · Oct 18, 2012

Put them in, and set the crank so that #1 is almost up. Put a used head gasket on the block, turn the head over and put oil based modeling clay on the edges of the combustion chamber, but wthin the area of the gasket. Set the head in place and put the head bolts in but leave them 1/8 inch loose. Turn the fan by hand, or crank, or raise one wheel and put it in fifth. This allows the engine to be turnd carefully through one revolution. If the piton raises the head, stop. if not they will deform the clay such that you will be able to see the clearance where the head comes close to the popup. Usually .060", to.080" is plenty. Jim

the tractor vet · Oct 19, 2012

No with that head you can run the above 8500 ft pistons and have lot of room to spare. You can even run a stock 450 gas head and be fine . BTDT.

sflem849 · Oct 19, 2012

(quoted from post at 22:12:05 10/18/12) No with that head you can run the above 8500 ft pistons and have lot of room to spare. You can even run a stock 450 gas head and be fine . BTDT.

So you can or can't? I don't understand your sentance.

So what would the best head for that setup be? 8060, 450, or ???

D Slater · Oct 19, 2012

See they list 2 pistons. Don't know if they are the same piston shape on the top or different. When IH made them the 374456 (memory may be a little off on the piston #) number, it was recommended for engines with a 8060 or 8574 head and the other number for engines with the 400 gas head. They were differently shaped.
Since the 400 engine used two different connecting rods and piston pin sizes it may affect what piston set you use. If you have small pin rods the big pin pistons won't fit. If its the big pin rod, adapter pin bushings can be used to change the size.
Probably can get more power from a specialty aftermarket piston with those heads. Depends on what grade of gas you want to run. You didn't say what suffix was on the 8060 head.

Dblair · Oct 19, 2012

the lp head on ebay is great the heads you mention are good heads for older tractors but not for getting much hp out of the 264 block made into a 281. a 362174 gas head is good . you will be able to run any of the pistons you mentioned with any of the heads including the lp head

the tractor vet · Oct 19, 2012

The best would be the 450 head . But with the high alt. pistons it will work on any head BUT not the propane .

farmall 400 motor

Anonymous-0

Well-known Member

Janicholson

Well-known Member

the tractor vet

Well-known Member

sflem849

Well-known Member

D Slater

Well-known Member

Dblair

Well-known Member

the tractor vet

Well-known Member

Similar threads