This is the firewall from my '51 Chevy. First of all it has the windshield washer accessory, so try to ignore that. Also, your fuse box will be longer, but location is the same. The rest of cable and wires should be same locations. Hope this helps.

http://s1116.photobucket.com/user/1950Cabover/media/IMG_0699_zpszwbxfrmk.jpg.html?sort=3&o=30

Kent

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