Do wagons need sub frame connectors

I can say that years back I had a few 440 4 speed cars I built back from d ead. 69 coronet rt, 69 440-6 bee. come to mind. if looking at them from behind, the sucker was obviously twisted. the 383 b body 4 speed cars might have been twisted from that torque too but I never seemed to notice it on them.
I add frame rails to everything now myself, tubing and mig wire is cheap.

as members on here have said, Ma Mopar should have added them to all these cars when new!??? but they wen to the unitized body to save some bucks in the first place!???? ha