Demon carb on 440?

Just bought a brand new 850 Speed Demon for $350. Manual secondaries and electric choke.

Anybody else running a Demon carb? Does it need any adapters for the throttle linkage? If so, who sells it? It's going to be sitting on a Performer RPM intake.

Also, any good/bad experiences with the Demon over an Eddy or Holley carb?