A V8 Z would be excellent if they could keep the weight w/in 150lbs of the Base 370z, say, 3380lbs. Figure a hp number of at least 400 hp... that would set it up to give the next generation M Coupe (BMW is going to use the M3 V8 in the next Coupe) a serious headache. Only problem will be more weight up front, but if Nissan beefs up the chassis right, the weight distribution should remain about the same. Unadultered speculation on my part, but I'd be interested in it if it happened.
S.