Info Needed . Help me please

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

Yes the "should have" engine # is the one stamped on the footbox plate , and Yes it matches with the one that's on the tag in the engine bay.
Yes the engine # I was looking was on the left head (looking from the rear license plate)
I always thought that all those numbers should match
Thierry