I think I saw one of those steal EFIs for sale the other day. The "carb" part was pretty normal but OMG the wiring that went with it was insane!

Those are bolt-ons. And yes, home made. I can't afford Hotchkis prices.
Well yeah since these cars were made for the general public street use it kinda makes sense that if you are going to abuse it on the track that there will be a multitude of improvements that will have to be made. 40 years and counting,a little bit at a time, so far...