Them ally's are a big pig of a trans aren't they?
Seeing them pics of that Perkins brings back memories..... We had a 354 in our Oliver Tractor until it bit the dust with a blown headgasket once again..... It needed an overhaul in a big way and I said screw it and put a cranked up Cummins in the tractor.. Much improved.
So, with those broken rings, did it gouge up the cylinder walls too bad?