I'm just chasing some information on what my engine stamps should read as. Ive trawled the net and can only really find info on the date stamp.

My HX is 5/77 build 308 4spd.

so the date stamp should be

xxE7 or Ive read a month or so before. But the other sandman at home has an engine built in the same month as it was so im leaning towards that.

Its just I have a hj motor and I'm trying to keep an eye out for something more original.

Any help/links to info would be much appreciated