You will need to identify which 70 you have. Go to this page of my website:
and click on the 70s until you find the one you own.

I have some parts from a 70 I recently disassembled, just post a list here on OG.

Jack Sim
Author, Gas Pump Identfication books 1st & 2nd Editions & Air Meter Identification books
We rebuild ECO air meters and sell parts.