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Farmall & IHC Tractors Discussion Board

Re: farmall 400 motor


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Posted by D Slater on October 19, 2012 at 05:59:07 from (184.15.8.46):

In Reply to: farmall 400 motor posted by alex t on October 18, 2012 at 20:36:28:

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.


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