Very neat idea.

I've thought of doing something similar in an even cheaper range. Used IMCA modified chassis, reskin it with a late 30s body, take it to open track days. Or even go a few steps down this path and remove enough safety gear and add street equipment.

Also thought of reproducing a Dodge kit Car. With all the repop E body metal out there, about ten years ago I estimated it at around $3500 for the frame rails, rockers, firewall and floors to produce a rolling chassis. Obviously prices have gone up a bit since then.