and posting the math here would certainly not hurt either
I measured the forward ports width through the throttle opening, using a dial caliper. The height I measured using a tape though it was difficult to be accurate. A pair of inside lathe calipers, reaching in through the runner would be better.
I'm considering also my tooling for the tb adapter project. I have a friend with a drill press I can use but I prefer to have my own. I also have to make two cuts in thick aluminum. I may have to use a hand saw and just take my time.