I absolutely love odd-ball swaps, nothing more disappointing to me than a killer hot rod Ford build with a SBC in it.....(I understand why, I just don't like it). I was originally going to use an Olds 350 in my truck (and still might at some point), and have also thought about using a Cadillac 500 in the old Chevy (and that could still happen too). I even considered using an old Desoto "firedome" 292 Hemi in my pickup, and would have loved to, but finding parts to make it work and be reliable for daily driver duties just wasn't a reality.
My Camaro is going to be getting a really different big power engine at some point. I have the engine already and have verified that it is what I think it is, and have a few of the parts I will need for the swap. But I am waiting to find out what I am going to do with the body of the car before I do it. The body it has is badly rusted, and also has an aftermarket T-top insert, so a ton of work needs to be done before it will take more power than the mild small block it has. I'm working on getting an early 70's Camaro or Firebird body to put my gear in, that is in much more solid shape, then it's game on!