RE: McCoy engines
Which McCoys are you talking about. The very early ignition and Glow 60's were the standard of the world. So were ignition 49's and 29's. The all aluminum glow engines of the early 50's were good engines. Then Testors bought out Dick McCoy and it was all DOWNHILL from there. The redheads of the late 50's and 60's were at best fair. Joke was if you got one started you just wore it out. The 35 was $5.95 when the Johnson CS was $17.75 and the JBB was $24.95. Super Tigre G21/35 was $17.95. The piston and cylinders of this series was very soft on wore out very quickly. The best cnc machinery in the world isn't going to solve that problem. The bottom end of the rod also wore quickly.
Think about it. If the best engines of the time were between $18 and $25, what kind of quality do you think a $6 engine had? Even the Fox 36X was about $15.
The last McCoy sereis were the type 21's and in the words of George Aldrich "absolute junk". The McCoy name died with the type 21's.