Okay, poking around without the search feature (and remembering to reset the viewable fields at the bottom of the page to 'all topics', Doh!) I came up with a few that should be relavent.
Vortec 4200 4200 Carb Intake 4200 Turbo Project 4200 Billet turbo exhaust Manifold So I'm adding this thread to my watched topics for a reference, still haven't found the thread with the older pickemup (Beater of the pack?) but I haven't quit looking either.
