Talk me into or out of Holley Terminator X

OK , I'm a very old school car guy. Refuse to put an overdrive , still rocking my 4 speed with 4.56's , Love my Quick Fuel 750 race carb so much but my buddy who is also old school was telling me about that Holley Terminator X setup. I researched on it last night and was very impressed ( not to mention it looks like a bad *** carburetor too ). OK I obviously know the basic pros and cons but with a decent built 340 that I have. Can I use my same intake and plastic fuel cell? Are there SIGNIFICANT power gains? Obviously need a new pump and filter but basically , I'm looking to be talked into or out of this by my fellow FABO friends.....GO!!