Disc brake small bolt pattern. Going to front big bolt pattern

Thanks for information I'm not going to get rid of my Kelsey Hayes 4-piston calipers going to be patient

There is one of the members on here that professionally rebuilds them. Run a Rebuild Parts Wanted ad in the Parts Wanted forum on this site to see if you can locate that guy. I read through his ad a while back, looks like he does a real thoughal job.

Can send you a note if I find him again.