I have a 71 340 block and the oil passages on the right side have been filled/sealed with what looks like braze maybe? I guess it could be epoxy though. Any idea why this would be done? They meticulously filled all the passages between the lifter bore and the galley but the rest of the galley is wide open.
They only did one side.
Any idea why this would be done?

1968 Coronet
1968 Charger
1966 A100 Pickup
1967 Barracuda
1970 Challenger
1972 Challenger
1973 Barracuda
2021 Ram 2500