Anything can be done, its a matter of cost -availability-fit.
Using current parts on a old casting, and the ability to get the basic set up/nozzles and lines fits those issues with the least amount of effort and cost.
Enderle will not work because of size and shape plus fitting placement, so it will have to be placed really off to one side and look like crap
Enderle "K" valve is expensive, and have extra ports and checks that wont be used.
Crower (RONS FI) is pricey and one still has to adapt.
My way starts with new parts from that era that a racer could have done that conversion back then.