Pick a block
Any of these...
LA roller
[email protected] 4.020
Or a
[email protected] 4.060
Or an early mag with the deck oil feed for la
[email protected] 4.020
340's need main bearings mod'd,slotted to align with the blocks feeds that are slightly off from the bearing holes.
360 just drop in, the have wells/bathtubs in the saddles at the feeds.