11.75" slider brake caliper brackets

Looking to see if I can pick up a used set on the cheap. PM with photo (including measurement from slider to bolt hole if possible) and price if you have them.

Also have some small block Chevy (blech!) racing parts that I'd be willing to trade - I have photos at: Vintage Small Block Chevy speed parts, et. al.. MSD box is not for trade nor is the Predator carb.

-Kurt