Hi Gary
It would be helpful if you could tell which model you have , is it 1980 or 1981 casing are slightly different shape but i think they bolt up in the same place. I can take a picture of my casing no problem , just trying to figure out how to post them bear with me . My casing has Ossa on it
the later one has the clover leaf emblem on it . As with any resto loads of patience required took me nearly a year to do mine, worth it in end though.
All the best