Quick Question: Subframe connectors- WHY didn't they do this from the factory?

While near 99.5% of the A-Body Uni-Body cars got the typical 'Union Label' weld job,

There were a few 'select cars' that got the 'special treatment'.

Additional welds, and in some cases 'hidden' cross-braces inside the frame.

See > Jere Stahl's 1966 Valiant 2-Door Sedan 273 Commando
See > The Golden Commando's 1965 'Goldfish'
See > Dave Patterson's 'Brand-X' 1965 Barracuda
See > Ron Root's 1965 Dodge Dart GT
See > Charlie Allen's 1966 Dodge Dart GT {D/Dart}