CMP Chev master cyl.
 

If it is the real thing.... looks the same and has the same bolt pattern and the 1 1/4 bore......

Have not seen that for years...

http://www.ebay.com/itm/1938-1939-19...a32e0c&vxp=mtr

If anybody gets one feed back would be nice.

Bob C

Bob, I am sure that my C15A and almost certainly yours have the mounting studs for the master cylinder staggered on the base of the casting rather than on the side as in the ebay listing.

Based on an old Wagner parts Catalog, a possible interchange might be their FC-4388. It is the correct style of mount (according to my statement above), 1-1/4" bore, stated to be for General Motors vehicles. They give the stroke as 1-7/16" but I have no way of telling if this matches the spec for the Chev CMPs.
The Chev M/C, part number 5450260 (does not appear in the cross reference section of the Wagner catalogue), is listed in some (but not all) CMP parts lists as "*" or "peculiar to to Canadian Military Pattern vehicles" but I have no idea what makes it "peculiar".

Master cylinder
 

Here is a link to my master cylinder.

https://www.flickr.com/photos/484045...57651747348529

First pic is the ebay cylinder. Second is gjamo's CMP cylinder. All my Chevs use gjamo's style cylinder. I got a new one off Ebay a few years ago. It was listed as being for a civilian two ton but I question that.
The guts are the same on both those cylinders. Just the mounts are different. It would be fairly easy to make adapters to use the ebay cylinder.

If I recall correctly, Barry was working on making such a bracket?

H.

If I recall correctly, Barry Churcher was working on such a bracket?

H.