KH Caliper Bolt - what do I have?

I think it's good that the guy up in Canada is reproducing those original style caliper mounting bolts.
At one time i thought it was absolutely necessary in using the originals on one of those KH 4 piston caliper, disc brake systems.
But in the real world, regular grade 8 bolts of the proper length, will work just fine, as probably the other two that you have worked, for however long they may have been in service.
I have been a rebuilder of those KH brake systems for over 10 years now, and checking all my records i sold 32 sets of brakes that i rebuilt.
Some had all the original caliper bolts, some had one or two replacements, and some had all four replaced with McMaster Carr grade 8 bolts, and nobody ever got back to me saying they ever had any kind of trouble with the brakes.
So just my two cents on the subject.
Use what you got, buy two more, your preference.
Don't worry about it, don't loose any sleep over it, or don't make a mountain out of a mole hill.
Jim V.
hemi71x