It's Regina not LH 2.2 and I've seen mixed things on +t ReginaA basic +t is still your best bet, best hp/$ deal you're going to get.
N/A hp is harder to come by, Volvo didn't really gimp these engines in easily fixed ways that other cars sometimes are.
+T involves all junkyard parts, nothing shiny or new, Volvo already did the work of figuring out how to put a turbo on the engine, just go get those parts.
+T with a little boost will take you from 115-ish hp to 170 - 200 maybe 225.