MrPhotoman, Shelton is 240M3SRT.

Here are the pics of the manifolds installed with the air Y connected to the throttle body. You can see the clearence for the SL55 just fits over the mod'd manifold. I put the boxes on and they fit perfect.

Now the bad news. When I was snapping the air Y onto the throttle body it didnt seem to be locked down on the bottom. So I pressed down firmer and reached under to make sure it was snapped on. Still feels loose...what the heck...$#&^@%$...that rubber gasket between the throttle body and the SC is cracked/split on the bottom. CRAP!! This is the gasket that has two metal brackets molded onto a rubber middle.

BrianBrave, what was that part number you looked up before?? I need that part.