Doggone, I can't remember for sure but I think mine was # 0026. I was ticked off at this "high" # because I had paid in full for my engine when Gary first started taking deposits. I wasn't on the "deposit list" so they sent some engines out before I found out they were shipping them. Grrrrrr.
The engine was going to be the K&B 1.20 FS but the $$ ran out after the move to AZ. Conley bought the rights and found backing to go into production. For some reason his principle backer withdrew funding and production halted. Later Abitar ( a group?) bought the tooling and went back into production with some mods to the intake system. My Conley had the long intake manifold that put the carb down near the crankcase CL. Abitar's had the carb up on the head and used a pump to overcome the prob of the carb being so far above a fuel tank's CL if the engine was mounted upright. I think they used the crank-driven Perry pump from K&B .61 Perry Pumper days. (?)
Mine ran good and I flew it it in an Ace 4-120 Bipe for a while. Trouble was the timing belt would slip periodically, necessitating that the engine be removed from the model in order to re-time the cams. I put a Saito in the airplane and sold the engine to a German collector for more than I had in it.
I ran it on 10% 4-stroke fuel. It was reliable but not a real powerhouse, compared to the Saito 1.20.
That's all I remember, guys.