When I first acquired my '40, I purchased a rebuilt 2F that had been modified for off-roading. Among other bits and pieces, it had a Clifford cam. The company's founder had a motto "6=8", suggesting that he could modify 6's to compete with V-8's. The engine had lots of low-end, off-road performance.
Racer Brown? He was a contemporary of Clifford, I think.