When you analze it, 22 degrees 2-stroke is 44 degrees 4-stroke, so the timing is actually quite radical. The head was typically run at 38 degrees total by Cosworth. Recall this had never been done before, and may not have since. The water cooling problem has only to do with an internal casting feature which pockets in the vertical, Cosworth proved the head cools nicely in the intended horizontal position.
As for the exotics, true enough I could build anything. It's more fun to dissect the rule book and (Smokey Yunick style) build what the book does not cover. You'll see three more curve balls coming for FE next year if all goes according to plan. All are legal, but will press the limit of available reasonably priced metallurgy. My hope is they will survive 5 hours race time; Just enough for one season. I might leak a few images in the spring when it's too late for others to copy. They will easily dominate the race course compared to the competition. Tim