Starting to plan my rebuild, keep the TBI or EFI or...?

How much power do you want to make? That is the deciding factor.
Eddie

Eddie, how much power can the 575 throttle body setup support?
I have seen up to 750HP.

That's about it. You start to run out of injector and that's about all the air that the throttle bodies can flow.

KJM: Is that Wes' old boat?

Eddie: Do the polished CFM TB's help any? Especially when used in conjunction with a TBS billet 575 replacement blower.

It's something I've been contemplating

Eddie, looking at +700hp and trying to keep the gas at 89 octane. I'm also looking into dual mapping.

Nope, Purchased from boat from Nelems Marine in 2006. It was Formula's 2004 "show boat". It had 83 hours when I purchased.