The street demon is a really good carburetor, seen one in action on a mild 440 recently and it ran pretty well. I recently came across Edelbrocks variations of dual four carbs with progressive and direct opening and calibration parts used. But if you aren’t concerned with not being able to pass a gas station, the predators are well known for being simple to tune and very responsive carburetors. Any used predator at a budget price is probably going to need a minimum of a full rebuild kit with a new metering block and spool, so your looking at $90-$100 per carb on top of your initial investment. But if I didn’t want to get into sideways mounting a set of Holleys, and having more height sticking out of the hood weren’t a concern, that would be the route I’d take.
