An unknown cast, a limp-dick budget ($11 million), an untried director and a plot recycled from "Porky's" won't stop "American Pie" from hitting box-office pay dirt. It's a prime slice of raunchy fun about four desperate-to-be-devirginized Michigan high school seniors - Jim (Jason Biggs), Oz (Chris Klein), Kevin (Thomas Ian Nicholas) and Finch (Eddie Kaye Thomas).
Since the deadline for sex is prom night, three weeks hence, dateless Jim qualifies as the most desperate. He wonders whether the