"almost all of the 216s the heads are made of cast iron"
Does he really say that?
What are the other heads made of...?
Well, I'm not sure but he mentions about aluminum pistons vs. the cast iron pistons used in the Stovebolt. I know there are some heads that are made out of aluminum, such as the '74-'77 911 heads which always crapped out and warped...I'll be honest, I've never rebuilt an engine, the closest I got was on a Range Rover, but the head/valves were gonna cost more than I felt the truck was worth. I vowed I would never get another English vehicle as long as I live...hence the 'ol '46...
