That is a closer look than I had taken. Like you say it would mostly show on high horsepower engines, the ones we want to build. The cam grind would certainly play a part. A good place for a roller cam and some forced induction! Didn't one of the Wayne heads employ different timing? Did I read that in the Twelve Port Story?
Yeah, I remember seeing on the Wayne Mfg. Company website before it was removed from the internet, and the 235 12 port head had a different valve arrangement than an OEM siamese 235 head, and required a specially ground camshaft to go along with the 12 port head.
