I seem to remember reading that article shortly after it was published. Back then, I was an annoying pre-teen kid hanging around Dad's race shop, but he built flathead Fords, not Chevy or GMC engines. The GMC 270s had lots of torque, and there were thousands of them available in surplus WW II military trucks. Their big problem was traction- - - -while they were spinning wheels coming off the turns, Dad's tight-winding flathead would be halfway down the straight, and his driver was getting set up for the next turn. His driver loved to "drift" the car through the turns- - - -chop the throttle once, then climb back into it and spin wheels all the way around.
Jerry