My earlier post identified the engine model wrong. It is OS Max 61 SF with a pump. I still can't get the con rod and piston from the crank pin. Wrist pin bearing is now free but still not enough clearance to get the con rod off of the crank pin.

Second question is now where can I get a rebuild kit for the pump on this engine?

HELP!!!

There is no rebuild kit for the pump. O.S. did not rebuild pumps when they were sent for service. They were replaced for a nominal fee. At this point, though, the only source of new pumps would be through the after-market. Either from an engine that has a good pump but is otherwise no good, or from a dealer who has a stock of "new old stock" parts. Some retailers accumulate parts for the engine collectors' market. They advertise in the back of the model magazines in small ads or in the classified section. Checking the RCU Marketplace with an "item wanted" ad, or an auction service may yield a new or usable pump.