you might be able to take him.. depends on how good you launch.. and inexperiences M6 LS1 driver will generally fry the tires on launch or bog it down.. Take him to lunch before you race to put more weight on him
What does you car dyno at? for reference I dynoed my 2K SS the other day and it did a corrected best of 320rwhp and 333rwtq.. and all i have is a lit and the SLP factory catback.. good luck