Okey-doke.
That covered, look at Taking aim at air drag again. Ignore the 20% lost to the trailer gap. You still have the proportions of front vs rear vs undercarriage. Things like the high momentum mudflap and vortex strakes apply to you situation more than something borrowed from race cars.
For the fairing for over the windshield, look to Luigi Colani's trucks.
https://ecomodder.com/forum/showthre...html#post70669
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.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
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