ORIGINAL: Hossfly
My one and only chance to make the NATs top 10 was the '71 Glenview NATs however I swayed to the Testors rep and tried the yet-to-be-released McCoy 40 grey-case. Fifth run on engine and 1st official was a barn-burner until after diving down from the 4-leaf, when she went to rat-race lean and ran for 11 minutes.
I'm not surprised. Personally, I was never impressed with McCoy Redheads. When Testor's bought them, and then turned out the "new" gray case Testor's-McCoy, they were an improvement - but not for stunt. Grinding out a bigger opening in the crankshaft port and smoothing out the internals in the case turned them into the hottest plain-bearing [slow] combat engine on the market. They were faster than anything - including plain bearing 36X's and Supertigers.