[sYc]

Bill Hartley was Yenko's chief mechanic, both at the dealership and on Don's race team. This memo, along with a couple others, was attached to Bill's pay sheet for 1969. It included notions where he went to several races with Don, including Sebring and Daytona. Of course Daytona was where Don won the Citrus 250 in '69.
What does the notation on the memo mean? To me, this memo, plus other info I have on '68s, means just what it says, that Yenko only switched engines in 45 cars in '68. But, that is not to say that there were not other '68 converted cars, with Yenko emblems, performance parts other then engines swaps, etc. Sort of like was done with Stingers, with different levels (stages) available to the buying public.
Tom