I found these wires at Dearborn ford swap meet years ago and recently found them in my parts stash. The guy had all old ford parts out of the plant or wherever he found them. I have never seen smog plug wires with polyflex heat shrunk plastic tubing and u cant slide it around as its tightly fitted in correct position as to protect wires from touching the hot smog tubes. The more common wires we see with smog tubing is much bigger and slides around and has thicker wall plastic tubing then later went to rubber tubing. Also note the different angle dist cap boot in first photo as its #3 only and unique (not like repos) and this is another way of identifying original wires VS repos besides the printing differences and the dist cap end boots are all moulded onto the wires so they stay in place when pressed on to the cap. I think these wires are first version smog tube big block wires and I don't remember seeing this date wires with this type smog tubing anybody else have original wires like these?