I posted that manifold in the engine section a while ago, it looks like they adapted the chevy manifold model to the 440, I think it looks pretty cool. I want to try and get mine to work before giving up on it, although it's very tempting. Got a little more done last night, cut down the throttle lever on the secondary throttle body (see close up photo above), broke the belt on my belt sander and dulled the band saw blade, time for new supplies....