I didn't find the pistons J&M Machine did. They were new old stock. The newspaper they were wrapped in was dated 1966.
Normally J&M would have pistons made to fit the purpose. Basically got lucky.
See link to online engine rebuild progress:
https://www.facebook.com/pg/J-and-M-Machine-Co-Inc-270076059772640/photos/?tab=album&album_id=1467684380011796
Normally J&M would have pistons made to fit the purpose. Basically got lucky.
See link to online engine rebuild progress:
https://www.facebook.com/pg/J-and-M-Machine-Co-Inc-270076059772640/photos/?tab=album&album_id=1467684380011796