Mike,
Yes, the Hazet 2760 is the Oil Service Wrench correct for our cars. The "Allen" hex insert is longer in the 107 later wrenches. The shorter hex insert is correct for ours. If you see the wrenches on ebay online, you will see the difference.
There are some listed for $90 or more, but you should be able to find a good one for $35-$45 plus freight if you are patient.
I am including one in each of my tool kits. Because they are one cool looking tool !
Great to see you at PUB.
Regards,
Mike Mizesko