Haven't seen anything yet in the way of a GMC 6-71 type blower manifold for a 4.6 2V. though I have seen a single 4-barrel manifold for both the 2V & 4V motor. Here's a 4V motor w/a tunnel-ram type manifold. Guess you'd have to settle for the Mach I hood scoop setup from KarKraft or CDC for your car if not willing to swap in an older motor.