I run the Ron's Flying Toilet, and love it.

A good alcohol carb/regulator/pump system can work great, but if making the switch to alcohol, I vote for injection.

The initial price might look a little higher than a carb setup. But once you include the cost of everything they get closer.
Fuel pump is included with the Ron's kits.
Fuel filter (for alcohol) is included with the Ron's kits.
Fuel regulation is part of the system (no separate regulator).
You need a fuel cell either way, but the injection likes the cell in the front of the car (not the trunk area).

My first few years I just used the basic system.
But then I bought the primer plus system (with spray bar) that allows both starting on gasoline, warm-up and idle driving in the pits all on gasoline. The gasoline primer makes it easier to start, especially in cool weather the first start of the day (50-60 degrees F). So I highly recommend it. Also, I use a 2 qt gasoline tank rather then the standard 1 qt that needs to be refilled often if you drive in the pits with it to keep heat in the motor.