Mark , while Im fairly passionate about Ford & racing, its been about two decades since I gave up trying to work out their reasons for some of the things they do, actually probably much longer when you consider while they built the most sensible blocks with good oiling etc,yet poor cylinder heads in terms of making power [Windsor]on one side of the river, the folks on the other side [Cleveland] were building cylinder heads cabable of making huge HP & what did they do, install them on a block with a flawed oiling system & weak cylinder walls that cracked every time there was a hint of detonation. Then they put both into production to compete against one another. The only good thing that came out of that was the Boss 302 and the Hot Rod guys who persevered to where we are today with an aftermarket reincarnation of what we could/should have had in the early 70's.Go Figure!!
Jac Mac