A lot of people don't know that Chet Hubbard was the first ever to make/build/sell a Roller cam, i was running an Isky .500 Flat tappet in my blown car in the mid sixies and in 1968 i tried the Hubbard roller cam, the car picked up 4 MPH, but the stupidest thing was the way he kept the lifers straight, you had to put a 1/4" sq rod thru the oil gallies and put pipe cleaners in the pushrods to keep the valve covers from filling up with oil, all in the day of old times. The car did run 148 MPH in the 60's
Zip.
O'h Isky was second to make roller cams.