Is anyone running this?

[RR Fan Dan]

Thinking about this for my 74 RR. I got the wilwood disc brake upgrade. Thought this would look nice. This on is a 1” bore is what I think I need, but there is a 1 1/8” bore too. Which do I need?

https://www.jegs.com/i/Leed-Brakes/633/A9F05/10002/-1

 

[#41]

The one that Wilwood says works with their brakes.