hey mate,
follow this link:
http://www.rollaclub.com/board/topic/62251-kexx-corolla-model-chart/page__p__628211__hl__+corolla%20+model%20+chart#entry628211
can't be exactly sure but I would suspect 69 is ke10 and 70 is ke11 going off this chart? I reckon with a number like that it was close to the last of the ke10's though.
Good luck with the build.
Glen