Replacing a crank shaft questions

good choices
Those HL lobes are later and should be smoother than the xl lobes which come down sorta hard
comp tried to improve on UDHarolds lobes to match the ones he did at Ultradyne
they have never matched the later UDHarold lobes done as the Lunati Voodoo Lobes much less the lobes he did later that were aquired by Howard
That said I would not use 106 0n a street build
Howard has other grinds as do Lunati for shelf grinds