I have two 2.0l M10s in Indianapolis. 1) is from a 76, from a running car that was wrecked. I bought the shell and scavenged the engine and some other parts. I tried to get it running and was only successful on 3 cyl. I didn't try very hard, it had been sitting for a couple years. It should be considered a rebuildable core or used for parts. 2) is a 75, also removed from a running car for a restomod, I bought it and it, installed in a project car and it smoked really badly. I suspect rings are stuck. It ran great, just very smoky and oil fouling plugs 3&4. I pulled off the head and looked around, other than the sooty oily piston tops, nothing seemed odd. Priced to go, let me know if you have interest in one or both.