All EZL equipped M117's had the large distributor, which in theory means any 9/85 on cars. The EHA wasn't fitted prior either as this was for the KE jet, which also came in 9/85. There are no 5.6's prior to this date as such, unless its a one off prototype which is unlikely.
It sounds like it might be a pre 9/85 euro 380/500.
This is all assuming that its an unmolested, standard engine.... I have a 5.6 822 in my pre 85 car, that I put the small distributor on and a K jet fuel injection for simplicity.


Only the engine number will tell us what you've got!