The callies magnum cranks for the 460 comes with the short snout. I also believe that the lighter weight series of scat cranks also come with a short snout. ATI - Innovators west makes a balancer for the short snout and it costs the same as the standard long snout. You can also run a small block balancer. Advantages? a little less weight off the crank - you can set up your pulleys closer to the block - more strength all around especially in super charged applications.
Something that I have come across in the past with crankshafts. I ordered a lunati and a ohio cranks shaft and I guarantee that both came from the same company. The exact same weight - appearance as in color - the same chamfering - the EXACT same Machining marks on the long crank snout. Absolutely the same company machined both brands. The lunati is usually $200.00 more. I`ve seen some pics online of a eagle crank without the ESP finish and it looked really close by the picture like the lunati and ohio cranks.