turbo'ing a del sol

Welp, its come time to purchase a turbo kit for my buddy's del sol and begin his first turbo car, hes been bugging me for so long, now he has the money lol...

Quick question...on stock internals, and stock head(mayyyybe better head later in his life) whats the most I can squeeze out of that 1.5 hp wise? With a decent turbo kit of coarse, im not skimping on that.