yea new that. have the motor in my car... and i think the way to tell if the b16 has 170 hp is either coming stock with a hydro tranny or being obd1. if it is obd0 and has cable, chances are its 160 hp. unless was converted to obd0 then you would check the tranny code to see if it was a ys1, then it would be the 170 hp version(if its short geard). but lots of ways to change things around if someone had sold you a used motor no tellin wat they changed. either way not to much of a difference in either motor.