Dimensions of safety devices rollbar in 75 911

[lookin]

Hi, Pelican heads-

I have a 1975 911s and I have the opportunity to purchase a new safety devices rollcage for a 964. I emailed the seller and he thinks the 964 is wider than my 1975 911s, but he's unsure.

My questions:

1. Does anybody know the differences in dimensions for these two models?

2. Does anybody have a safety devices rollbar in an 75 vintage 911 that they could take a couple dimensions of, so I could relay this info to the seller and see if we could make his cage fit my car?

My thought was if the contact plates were a little different I could just cut them off an reweld but if the bends were different I'd buy a new setup from stable energies or if anyone know's of one a distributor for this rollbar on the west coast.

Thanks for the help.

Dale