I believe this was a TV movie from the 70’s. It involved a van carrying a pallet of gold bars. The van struggled with the weight. I think there was a scene where the van was going up hill and the gold was sliding towards the back doors of the van during the getaway. I don’t believe they lost the cargo though.
This episode, Patty and Selma had a boyfriend pick them up or drop them off in a car that was ball shaped. It had no wheels, the ball rolled around the occupants. It was cage like so you could see thru it.
I remember watching this on TV, I believe late 70’s. The scenes I remember were this guy was a stunt driver preparing to commit a crime and was planning his getaway. He was using a heavily modified car (I think it was a Camaro or Mustang) with a full roll cage . He did at least one practice run involving a rollover down a bank where the car lands back on it’s wheels and he is able to keep going. I tried using the site http://www.whatismymovie.com
Any help is greatly appreciated!