Is the motor number it "should have", from the plate on the footbox ? (that the brake booster is bolted to)
Does it match the motor number tag in the engine bay ?
Are you comparing it to the number stamped into the back of the block (left side) right below the head ?
Numbers stamped on the block here are not the typical location Ford used. So the block you have may have been swapped by DeTomaso themselves, or someone found a block from another DeTomaso.
Chuck
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