Fuel Injection Conversion for 62' Slant Six

Several folks have MPFI on Slant Six motors. I have it on mine.
Use a MS3Pro to run fuel and ignition. Use a ported GM Vortec throttle body, all GM sensors, Ford 7.5L fuel injectors, mounted in a Clifford intake where I drilled the nitrous boses to accept the injectors. I will see if I have a recent photo available to post.

What do you gain with say, functionality with MS3pro above the "regular" older Megasquirt DIY kits?

I've got an MS2 kit which I STILL do not have fully assembled.