I like the /BMMP idea... Sure, the Cd won't be great, but: you have a frame for attaching your roll cage, a full bed for holding batteries, water/intercooler/dry sump tanks, relative ease for swapping engines, and pretty
soft records. An extended cab Ranger would do all of that nicely. Run E all the way up through AA using Ford stuff. Lots of aftermarket support for mounting about any engine.
Dunno why the idea to run a Ranger stuck in my head, I think it has less to do with the chassis as the desire to build a less-known Ford motor and see what'll it do! I'd love to build a 3.0 Duratec, since at 182 c.i. it comes in right at the top of the F engine class. I
know those motors will make power too; Google the Noble M12 super car! Then bolt a Getrag MT82 6-speed trans using a 3.7 v6 clutch & flywheel from a 2011-ish Mustang.... Which comes to my next question: What category would a turbo or supercharger v6-powered mustang fall into, Blown Gas Coupe, yeah? That'd be faaar more aerodynamic than a Brick-with-wheels Ranger. Oh, too many ideas, need to stick with one plan and focus!!!!