Would recommend using the Eagle crank over the Scat's. This is one area where the Eagle's have an edge!
They are much easier to balance, been there, done it!
Thanks, Gary in N.Y.
P.S. Having said that, I would definitely use the Scat rods however (if you need rods) over the Eagles, they are lighter, plenty strong enough, and much easier to "fit" in the block!!