It didn't fit perfect on the water neck on the TBI intake, but I was able to use the original steel upper water pipe.
What to do about the throttle kept me puzzled for a while. The firewall isn't quite as straightforward to modify for the cable as the 67-72 is, so in the end, I ended up using a rod from a universal battery hold down attached to the stock throttle linkage, & a L bracket on the throttle body. It doesn't look pretty, but it works for now till I can do something better.
Pay no attention to all of those wires that aren't buttoned up yet. I will get around to it eventually...