The cheapest route would to buy a used 6.1 crank, offset grind it for Honda rod journals with a .927" pin and 6.200" center to center which is an Eagle shelf rod. With a 6.125" rod you'll need to clearance the crank throw's. Don't forget to reharden the crank after the crank was reground. We do one step further and cryo treat our offset cranks.
What the cost to do the crank as you described? My 6.1 crank needs to be cut anyway.
Also, anyone know what material the 6.1 crank is made of?
