Hi, Yes, you will need a turbo with a seal to stop it sucking oil past the shaft and into the compressor housing when it's under vacuum.
I'd have to think that the fuel being added upstream would cool the charge down.
I think I've got a map for this turbo somewhere , I'd just have to find it. It's a Rajay 300E turbo. Still supported because it was used on aircraft as well as auto applications.
Sure, I can't see any reason why you couldn't use it as a twin setup.
