Original Little Red Wagon A-100?

Subframe detail:

To Beef up the unibody truck, Schaffer and Collier put together a 75 inch long, 36 inch wide subframe to house engine, transmission, and rear axle. Welded steel tubing three inches deep by two inches wide and having .110 inch wall thickness was used. Engine mounts and transmission support members measure 1 1/2 X 1 1/2 inches. With this subframe arrangement the entire drivetrain may be easily slipped in and out for maintenance.

The truck was first run at Cecil County, MD Drag-O-Way on September 19, 1964 with an out of the crate Hemi:

The wildly enthusiastic thousands who poured into Cecil County Dragoway, Bayview, Maryland, to witness CARS Magazine's All-Star Super/Stock Invitational meet were trreated to a big bonus. For Dodge Division of Chrysler Corporation chose our meet to introduce its latest drag racing conversation piece, which it calls the "Little Red Wagon."

When run for the first time at the CARS meet, the Wagon was powered by a right-out-of-the-crate Hemi without the benefit of blueprinting, etc.

Ramcharger Jim Thornton made one run in the little bomb and dialed his way to a very creditable 11.2-second ET.

http://www.sweptline.com/hist/lrw.html