[SSLance]

Talking with real world experience here...someone that has raced with and street driven a CCC carb setup, then a manual carb setup, and finally a Holley EFI setup all on a similar SBC setup in a similar vehicle as yours...

Once someone with your ability does the install correctly and begins to learn the Holley EFI software, you'll wonder why you didn't make the change years ago. The amount of real time data you can collect and use to fine tune the software is mind blowing and the results from collecting and using said data to make the engine run better are worth the pain of install.

The main question I would be working on is how best to design the fuel delivery system...retro fitting a fuel module to not only feed the beast but to do it without regular pump failures or fuel starvation issues means going a step above most regular installs.

Being able to salvage your old intake to finance the new parts makes it an even easier question to answer at least in my humble opinion. Good luck with your call.