WOW, what a car, congratulations.
I went through the same process as you are to get the morrison injection installed.
I remember the distributor I bought still didn't clear the injection runner, so the guy that machined up lots of my parts made one from scratch.
It just clears.
You may have more room because my motor is a 347.
You can't see it in the pictures but it turned out great.
Regards Mando.