400's would be a good choice,but with that much weight up front 340's might work also.I shoot Beman MFX Classic 400's out of a 61#@27 Green Mt. and a 58#@27 Fox longbow.The MFX is 29.5" BOP,100 gr. insert,125 gr.point,wraps,3-5" feathers,total weight 560 grs.Your bow being cut past center and heavy front end may work better with 340's.I find that a center cut bow will require a stiffer spine arrow but also can handle a bigger variety of spine weight.My bows there are not center cut so I have to play the paradox and get the weight I wanted.