After a little searching for a heavy-wall pipe for the air inlet from the throttle body to the blower, a nice piece of 6061 tubing was found..... 2.5"OD x 2.0"ID. It'll be bore milled to ~2.20"ID to match the cast elbows and throttle body bores:


If the formula I'm using is correct, air velocity and pressure losses should be fine for the desired HP with the OE diameter system.... if not, I have a larger throttle body from a 3.5L and will make another (larger) air inlet system.

Frank