Modify a Magnum for LA rocker gear oiling ?
Don't look like the left gallery is doing much besides the lifters, seems like might be a good spot.
Except the drivers side oil gallery is entirely fed from the number one main bearing.
In the OE configuration the drivers side head is oiled off the number 2 cam bearing and the lifters are oiled by the gallery that’s fed off the number one main bearing.
I try to eliminate all that convoluted oiling and just let the main oil gallery feed the crank.
Also remember you have to do something about the oil going to the number 2 and 4 cam bearings.
If you pull oil to feed the rockers off the oil pressure gallery you can block off the oil coming up from the cam to the heads.
I clock those two cam bearings so the oil holes on the block are covered and then I drill a new hole in the bearing once it’s in the block.
I could just drill it beforehand but I do it in the block.
Also remember that when you do any modifications to the oiling system that affects oiling to the rockers will almost always be full time oil to the rockers.
Chrysler didn’t design the system that way, so just like a big block you may need to restrict oil going to the rockers.
Full time oiling up there still requires a significant amount of oil and that oil can be better used somewhere else.