According to the NGK website - Morgan 4/4 1985 is BCP6E, Escort 1600 1985 is BCPR6E, or Iridium plugs for both - (Expensive) is BCPR6EIX
Dave,
I've fitted the iridium plugs to my 2000 Zetec. As you say, pricey- but they do perform very, very well
regards,
G