... Further investigation reveals that the hopped up engine and drivetrain are indeed Willys but the car itself is a Woodhill Wildfire. A fiberglass bodied sportscar created by Robert "Woody" Woodhlill in the early '50s..
Check the Motor Trend story at the link.
I was impressed by this photo
Which probably means it could support a hugemongous big block monster.
Here's a "moon shot" of the actual engine compartment