[kach22i]

Wow you have done a lot of work already.

I trust most of it was fun.

I missed what you have done for a front chin spoiler.

What sort of suggestions are you looking for at this point?

In the early 1980's I had a short-box E-100, the only thing aero-wise I did was the front chin spoiler. It didn't raise the mpg (from what I could tell), but made it much safer to drive on the highway, especially on windy days.

Do you have electric cooling fan(s) and a grill block?

If you have high miles the fan clutch might be going, replacing it with electric fan and controller makes the engine run smoother. All that added fan mass and clutch silicone over the water pump is not needed.

I am not a fan of grill blocks, I've had one fan controller already fail on me, ram air was the only way I got home. However it is supposed to make a difference.