Ronal R9 wheels

I was at the local salvage yard today and saw a set of Ronal R9s on the shelf. They are listed as GM 5x4.75” pattern, 16x8”. I would LOVE to put these on my 94 XJ40. They measured 5” of backspacing, and I pulled the spare out of my car it measured 5” back spacing as well. After googling the wheels, I did not come across any pictures of them on a Jaguar. I understand they may be not be the correct size for hubcentric, but I could have them opened up by a machine shop. Anyone have experience or know anything about these wheels? The price is very right for these.

EDIT;
I posted too soon.

http://www.jag-lovers.org/xj-s/book/Ronal16Wheels.html