When I get home I can send you a picture of a pair of '66 calipers I haven't installed yet on my '66. I do also have a'67 with disk. There is a definite diff. in the casting but used with right hardware can be switched.

 

I think there is also a length difference on the pistons from 65/66 and 67. Not sure.

 

Yes, there is a difference in the piston length. Also, there is a difference in the brake pad retainer clips with (again) 67 being unique.

 

Virginia Classic lists two different piston for 65/66 vs 67. Same with the seal kits. The old pistons I removed from our 65 calipers are 1.120" high and 1.630" diameter.

 

Virginia Classic lists two different piston for 65/66 vs 67. Same with the seal kits. The old pistons I removed from our 65 calipers are 1.120" high and 1.630" diameter.

Then you either have 67 calipers or the wrong pistons in your 65/66 calipers. The 65/66 pistons are 1.0625" in length and the 67s are 1.125" in length (approximately, I would have to look up the exact measurements as I have them from when I made a few sets of each out of stainless). Both 65/66 and 67 pistons are the same diameter.

 

Looking at the bores of the calipers, the depth is 1.00" with the dust boot groove in about 1/16" or so. The 1 1/16 piston would seem likely but I am not quite sure. The 1 1/8" piston would stick out further.

 

I have the 1965 calipers but need to make some stainless steel pistons. I am a machinist so 316 material and a lathe is all I will need....besides dimensions.
I have a set of 1967 pistons that measure 1.634" od x 1.125" long with a 1.125" id x .875" deep.
I have some parts started with the same od but only 1.062" long with a 1.06" bore x .750" deep. I need to verify the bore size of the piston, for this is what captures the pads. Can anybody help??
Thanks...

 

You do not need to worry about the ID bores on the pistons as they DO NOT capture the pads with clips like later model ones do. The pads are held in place by external bolt on retainers. Simply machine a slight depression in the center to prevent too much contact with the pad....maybe .050 or something. I do not remember the precise measurement of what I did on the sets I machined.

BTW I used 304 stainless. I do not remember exactly why I did but at the time I spent some time looking up the properties of alloys and my buddy who is a machinist with 40 years of experience determined I should use 304. I think it was the best trade off between anti-corrosive and machineability properties. I made about 30 pistons and never had to change the inserts for any operation.

 

Much appreciated RonK! I was worried I may have already cut out too much material. Looks like Im set to go.

 

Very easy to tell the difference between 65-6 and 67 K/H calipers. 65-66 use a 5/16" brake hose fitting. In '67 it increased to 3/8". Another minute difference is that the '67 piston dust boots do not have the snap on metal retainers like 65-66.

 

Thanks for info, I started to wonder mine, because I have 67 spindle but obviously 65 saddle, which is nice because it is disk brake car. At least there is something original.

 

Ran across this in my files...

=======================================
65-66 Caliper : C5ZZ-2B120-C
Inlet: 3/8"
Rebuild Kit: C5ZZ-2221-A
...Comprised of
...4- C7ZZ-2B115-A Seal
...4- C5ZZ-2206-A Boot (2.44 OD)
Piston Kit:
...C5ZZ-2196-A
...8- 1 5/8" x 1 1/16" long
Brake Hose:
...C5ZZ-2078-A (15" long)
Shield:
...C5ZZ-2K004-A
...C5ZZ-2K005-A
======================================
67 Caliper C7OZ-2B120-C
Inlet: 7/16"
Ridge on the end of the core (protects the cross-over line)

Rebuild Kit: C7ZZ-2221-A
...Comprised of:
...4- C7ZZ-2B115-A Seal
...4- C7ZZ-2207-A (2.38 OD)
Piston Kit:
...C7ZZ-2196-B
...8- 1 5/8" x 1 1/8" long
Brake Hose:
C7OZ-2078-B (14 ½" long)
Shield:
...C7OZ-2K004-B
...C7OZ-2K005-B
======================================

 

Charles,
Good stuff.

 

Yes indeed, much appreciated for the info Charles! I found I have 1965 calipers. I made my pistons ordered my seals and boots but did not get any sort of clips to retain the dust boot. It looks like I will also need the pad retainers? As usual piecing together a set of disc is almost more expensive than buying a kit! At least I can run my factory wheels with the KH setup.
Thanks for all the info guys!