The ones I personally own are my daily/frequent drivers, and they stay in my home garage(s), along with my wife's cars (incl. her micros), and house staff vehicles. It's best to keep them separate to avoid any... misunderstandings.
Well, it's a Cheetah GT (which is basically a Corvette) with a Miura kit on it, so a SB Chevy seems appropriate to me and probably would be the most painless way to go and should essentially bolt right up, in theory. Mostly I want to get the power output similar to what an SV actually had, @385bhp, and that's relatively easy to do with a NA 327.
Since I'll never have a real 250GTO, the idea of spending 50M+ on any car seems nutty to me. I think we're on track with a deal for that recreation, I talked at length with an expert on that era of Ferraris who is really familiar with it and even helped consult on its construction, and he said that aside from the original serial plate and some non-visible structural and mechanical improvements (which were commonly done to many real GTOs) it's "indistinguishable from the real deal" and "offers a driving experience equal to an original". I'm going to go with what he says, since he's like, the guy who the big wigs get to authenticate and sort their cars. My minion is going up there to close things up, so I'll see how that goes.