If you are interested in going turbo, I'd recommend swapping a BP jdm turbo engine, get a 1.8's ecu and wireloom, and make it a mitsubishi ecu hybrid... meaning, running a Mirage locally flashable ecu and wireloom and run them in tandem, then tune the Mitsu ecu like if it was a stand alone. If you are in PR, you know what I'm talking about. Or you can always buy the jdm ecu and loom for a hiher price for stock specs
You in theory, can run a b6t... but why when you can get a GTR(bp) for a little more and it's a newer beefier engine. About, the tandem thing, I've seen in done in turbocharged FPs, specially the twin hall sensor bpd, I figure that it can be done all others as well