[elhigh]

I'm loving this thread. Not a Chevy fan, don't own a diesel, but I'm getting a huge charge out of it just the same.

Your Sub is an aerodynamic nightmare. If you're cracking into the middle 20s with nearly no aero improvements, I think you're in for a shock.

Judging by your temperature reports, I'd skip any front end coverage, unless the headlights are recessed. You could add an airdam that would reduce engine bay pressure and improve airflow through the rad. That's a good thing.

Wheel skirts at the rear. The wheelwells on the Sub are gigantic, big whirling air buckets, there's a lot of improvement to be had there. And almost any kind of bellypan will be good for you.

I know you're already up on all this, I'm just dying to see how it turns out.

Thanks for sharing.