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!!
EFI is great in many ways. Rich at FastmanEFI is the guy you should talk to regarding the pros and cons of each system. He also tunes remotely. Great guy to work with, very experienced and informative plus gives great deals on all Holley's stuff. I used him on my conversions. He's also an extremely knowledgeable Mopar Guru.

https://www.fastmanefi.com/