I don't know where the idea of new is better comes from

. I mean do people believe car salesmen.

There is a lot right with the front end of a 50's Ford. My 56 has double wishbone front suspension with nice long control arms for stability. Granted things could be done with spring rates and damping but show me a car where it can't.
I bought some parts off a guy recently who had a ute like mine and had a 70 GM (HQ holden) front end in it. I know donor car as my brother and father owned one each. They were never known for thier handling or braking. I'd be chopping up my original car so it stopped and handled worse 
It can be done right but there are a dam lot that aren't.
Cheers
Warren
Grizzly (Aussie Mainline)