That thing is just asking to get gutted. If I had the cash right now, I'd spring for that and have Fobia weld in whatever was necessary to mount an EJ20 and AWD drivetrain.
Yeah, one of the local rally guys had a FWD Justy set up for rallycross (gutted, hatch removed, lots of other stuff removed too) and it was wicked fast and drove like a go-kart (and lifted the inner rear wheel in every turn). He sold it for about $500 and I was sooo tempted.