Spanky, I looked for a pad and there is not one there, its just a boss for the dist.,unless I have to take out the dist to see it.but from what I can see its just a round boss hole for the dist, I have looked for any flat spots that maybe there would be some numbers but so far I come up empty, the engines on a factory slant and you would think that if it had any numbers it would be on the drivers side(manifold) because of the slant. I did see on the head the GMC casting ,and on the center part of the engine. I have to take out the dist anyway so I'll do that today and see if there is anything under it. thanks for your help. Dan

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1936 1.5 wrecker,1937 gmc coe,1939 Chevrolet coe,1942 4x4 coe, 1942 coe,1946 dump,1947 2 ton dump,another 1947 2 ton dump,1950 coe,1967 c30,1937 cat 22,1936 Chevrolet 5 window foremans coupe, 1914 ford speedster.