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.