Hi Peter. Mine did run using glow plug. Plenty of noise and it filled the workshop with smoke. I also used a solid iron piston after honing the cylinder to a perfect fit and used a 12" prop. All the best with it. Best regards David Murray.
The clue is in the drawings and instructions for the Bobcat that Malcolm did after the Lynx, just scale for the Lynx valve heads. Make the blank valve seat/guides insert in the head and then drill the ports. It looks like I also included liners for the spring pockets, probably unnecessary.