VINTAGE   1958  JI  CASE  800  GAS STD  TRACTOR  -ENGINE CRANKSHAFT PULLEY  ,  # 251 Engine ?,   Could fit  830  STD ? Others ? ,   Used parts,  Used original Case item  .To see other tractor parts or farm collectibles - Check our Ebay store, Thanks,  NOTE-  Bidders outside the USA need to be prepared to do payment by paypal. thanks