That brings back a ton of great memories of my first Dart, a brown '70 GT, .030 318 with 340 intake and J heads, fair amount of rust, and struck fear into the hearts of IROC and Trans am owners throughout Winnipeg 12 months of the year in the late '80s. That car could go like a scalded cat, just don't expect to stop in a hurry.
The beater actually has good disk brakes on these days...back in the first picture it had small bolt drums on the front...the rear end is an A body 8 3/4 unit that Forzley narrowed.