Thanks for the replies.
My greyhead has less than 100 hrs and runs very good, just wanted a spare engine.That’s when I noticed the difference in the left front mount.The bluehead top bolt size is smaller and is offset as compared to the greyhead which has the same size top and bottom bolt and or in line when each other.
All the KT’s I have seen with a 582 bluehead have a bottom plate mount. I’ve not seen any with the side mounts like mine.I’m sure mine is not the only one.
Thought maybe someone out there has had the same problem or knows the answer.
Thanks to all for your help.
Ray