Most of the 250 - 292 style motors mounted the A/C brkts on the front right side of the head just above the distributor on the 250. You will see two holes in the head that are best suited for this. My '54 had an aftermarket compressor on it with a homemade brkt but the support interferred with the vacuum advance on the distributor. On my 292 I just bought a complete set of brkts off of e-bay to mount the late model radial compressor on it. You can check with your local GM parts dept but I don't think any of the earlier brkts are still available. Mave have to go scrounging. Good Luck
------------------
Ontario Inliners
1940 Chev Sedan
1954 Chev Custom
1965 Chev Pick-up
