LA vs Magnum

Heads: Can be used but must switch to AMC type lifters with flat tappets and pushrods to Magnum hollow pushrods
Cranks: Must use Magnum harmonic balancer as balancing weight is different so flywheel or flexplate is Magnum only Balanced
cams: Different snout with no provisions for fuel pump eccentric intakes: Very few choices to choose from but compatible with larger port 340/360 heads Bolt holes Vertical not angled many after market are predrilled to accommodate LA or Magnum
oil pan: Magnums we're only produced with front sump pans in trucks not useful for ABodies, pan dimensionally same as LA 360 at block mating surface