HOLLEY SNIPER FUEL INJECTION ~or~ CARBURETOR???

I fully admit that for a "simplified startup" on a new engine, a carb seems like it's a whole bunch simpler. That's what I plan to do. My EFI path was a "step by step" due to used parts What will go back on "for now" is a Holley HP computer driving an old Holley TBI "commander 950" TB which can be upgraded to port injection

Also I "started out" using the EFI ONLY for fuel, not spark advance. So that removes yet another complication "I don't have to worry about"

In other words---how much would it take, really.........to add a regulator so you can temporarily toss a carb and distributor on the engine to get it running and broke in, then set up the EFI once you have the "initial startup" stuff handled? Or if you don't need to drive it with the carb, just "overhead" hang a fuel tank (outboard motor?) to supply the carb