[brucepick]

Excellent work!

Now maybe it's time for some mods?

If you do a grill block, set one of the SG displays to show engine temp. So you will know exactly how hot it's getting. If I recall, the display is labeled ºFWT (Fahrenheit water temp). My grill block is in chunks stuck into the grill openings, so I can easily add and remove pieces.

A belly pan is pretty stealthy, and easier to do on a truck than on a low-to-the-ground car. Consider 5.4 mm. lauan plywood. Quite stiff so I think it won't need framing, or not very much. Put aluminum flashing over the lauan for shielding, where it runs by the exhaust. Pop rivets with wide flat washers, and sheet metal screws are your friends. Stainless screws will hold up well.

Even a simple plywood sheet over the bed helps the aero there noticeably. There's more you can do for the cargo area, but that area takes more planning and design - see the many threads on that idea in the Aerodynamics forum.