1973 340 Std bore.

Did they set the sleeve against a step at the bottom of the cylinder or bore straight thru?
Got any lifter valley pictures?
What other machine work has been done to it? Any stripped bolt holes?
Any think broken off? Like ears for motor mounts or back corners of the block?
I don't know about the sleeve but I will get you better pics. The ears are good. I'll check all the bolt threads and check for any other machine work and the back of the block for you.