Glidden Arrow

Rob, per the current owner, the engine was over 15:1. I think it ran on ethanol.

It's somewhat common knowledge that Glidden altered the valvetrain angles. Dude was a cast-iron welder extraordinaire. I watched a video that described what he did to the Cleveland stuff to make it work the way he wanted. There was a picture of the furnace he used to heat the parts up enough to weld on them. Minimizing or eliminating inherent design flaws in cast iron parts was not an option but a necessity.

Mechanical ingenuity is becoming a lost art in the computer age.