Megasquirt or it's variants.

That's what I am putting on my 51 Plymouth. All the hard parts, except the actual throttle bodies and air cleaner, are off the shelf OEM parts. Wiring is wiring. The computer is the only unique part and it'll be been around longer than the current stuff being talked about. Way more support than them too. Open source coding, you want a unique feature? There are people that will write that for you, for a fee. Yes t will self learn too.

But you do have to know something about what you are doing.