Well, as long as we're off topic...whatever the topic was...the strength of the car is self evident. No cowl shake, the doors closed with a clunk, etc.
One guy here, Rally Snake, competes regularly with his Arntz in rallies throughout Southern California and generally kicks a lot of modern machinery a$$ doing it. Has a funny looking motor with Ford valve covers with the ignition out back (Chevy powered like many were). I had a Cleveland...well matched with a five speed...which I autocrossed pretty damned successfully up here in our SCCA chapter, and regularly played at Willow Springs.
Arntz showed up at the Bay Area Cobra Club dinner a year or so ago, and a guy named Monster has a sweet Arntz.
I've said it here many times...it took a arruminum Cobra to get me out of the Butler.
Stick around...some of us only have 10 or so horesepower and welcome folks who can shed light on the history of this fine madness.