I don't think this is a Ford CMP axle or frame. It is probably off a Ford Commercial truck (amongst others it is could possibly be from an F-6 or F600 truck, but not an F60 CMP). The differential is centred on the axle, the CMP is offset to the right. The CMP has two holes drilled into the diff casting to mount the bracket for the shock absorbers, this diff doesn't. It's hard to make it out in the pic, but the pinion flange appears to be a Spicer type where the uni joint mounts directly to the flange (like a Jeep), the CMP had a flange where a driveshaft with it's own uni flange bolted on.
A side on pic showing the wheels and hubs would confirm it, the commercial hubs having 5 wheel studs.
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