The M116 required 96-96 octane fuel, which wasn't available in the US
after 1972 when they took the high lead levels out of gas -- later all
lead was removed. It is also dirtier, and wouldn't pass the US
emissions testing.
There are some non graymarket M116s around, but they are rare, would
have had to have been imported prior to Dec31 1972.
The shock absorbing bumpers appeared on 1973 model cars, so it's likely
that the one I saw is a gray market import OR a very early one, sold
before August 31, 1972.
Peter
