Pics sent to me by Mark Denny, who found 'em on Ebay

This machine is the only one ever built.
It is an overhead valve of a flathead 741 30.50 indian.
The conversion was done by Elmo Looper
(the purchaser of Crocker motorcycles inventory) in about 1959.
Among the many modifications are:

The machine weighs in at 300 pounds dry. It was said to have been very fast and was the prototype for a modified production scout that was being developed to take advantage of the plentiful war surplus Indian scouts.