Very happy to have this hercules extruder sitting on my desk. Shout out to Max Steiner for time on his machine.
Nothing fit correctly! I had to file down just about every surface, but it’s very close. I need to add wiggle room for all of the holes.
Here it is installed.
It’s quite heavy, and puts significant torque on the x-carriage.
Prometheus Fusion Perfection 
That is VERY cool. Congratulations!
Thanks Lou! Thank you for the idea!
I think the weight of the stepper is going to be a problem. Perhaps a smaller nema17.
Also balance is an issue, it might be better if the heaver stepper motor is on top of the x-carriage.