Power steering can be deleted by removing the pump, reservoir, and lines. I dont believe there is any wiring that will affect running of the car.
Carbys are their own source of problems, just different problems to efi problems. I would try to do the wiring and keep it efi for reliability, unless you want to wildly modify it in future, in which case an aftermarket standalone ecu would be best, but more costly and much harder to install than a stock ecu, as you dont just have to wire it, but tune it also.
Theres a few kinds of carbys people use, webers, dellortos, fcrs. You can buy manifolds for each online if you search for bigport carb manifold, but then you need some carbs, and they really should be tuned by someone who knows their stuff. Personally I think the wiring of efi is more fun than the jetting of carbs.
Plenty of folks on here are pretty experienced with wiring up a bigport, so just ask the right questions and you will get good answers.