Ustyled Heisler Head

Does anyone know if theres enough room in an unstyled john deere A engine for the new reproduction M&W style alum. pistons and a heisler head. Wasn't sure if there would be enough room with the ears protruding from the heisler head with the tall alum pistons. Thanks for the help!
 
Stock Crank no problem. I think the bra tips go into the head about 15/16. With the 6.750 crank will also work. If you have the really high comp. pistons you might have to take a little off the pistons or tips of the head with the later crank. With .125 over with a late crank and Heisler head is around 50 to 52 HP.
 
Thats exactly what I was looking for thank you!

Someone had told me that these older heisler heads for the unstyled tractors took a special valve diameter that's not made any more. Is there any true to that or will valves from a A or 60 work without cutting bigger seats?
 

You dont have an email listed or pm open. I'd be interested to know more about yours but I'd still like to find some more info out about these heisler heads before I buy one
 
Henry @ H&J machine in Carrington ND can make you ANY valve from 16D nail size to a 6" diameter head & very reasonable. I had some made for a Heisler for around 40-45$ each, custom oddball size. And the seats for them.
 

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