The numbers aren't marked on the locks anywhere, Clayton, so like Danny says the only place to find out is from Heritage, assuming your ignition lock is the original one.
Hey Danny, where did you find a locksmith who could cut to code? I have a couple of original blanks I want to get cut as spares for my cars but having trouble finding someone who can do it. If it was someone local to you do they do mail order?
Good luck with the rally this weekend[:D]
Tony
<font size="1">1981 2L FHC Cavalry Blue - very original & not rusty!
1980 3.5L V8 DHC Regency Red - on the road again.</font id="size1">