This could go on forever.
I am responding as I see it.
The question to me was would I have the block line bored. My experiences.
Racing ? Yes to correct any alignment problems and eliminate friction.
Probibly not if indeed this engine has 150,000 miles. If block has this much wear on bearings it probibly has ridges in cylinder the size of the grand cannon. Id insytall new bearings, that fit crank whatever the undersize may be as long as crank is round and true and even.
Bore block for new pistons.
normal other replacement parts that would be worn out. CAm Timing chain, gears, Head rebuild.
The indecater to me to line hone block is if you spun a main bearing. Line hone would be mandentory on any bearing spin.