On my current 550 cube 572-13 motor project, i may consider going bigger if it makes sense . Monday i am going to pick up a Callies 4.5 stroke crank with 2.375 rod pins. I can offset grind it to 4.650 to use a 2.200 rod bearing. My pistons on order have a compression height of 1.452 to match my Molnar 7.1 h beams and 4. 315 stroke crank. I would gain about 43 cubes , or 593 cu in.
Pros -
43 cubes , more torque.
30 more HP?
Cons-
Cost, lose the center counter weights i have on the 4.315 stroke crower.
Higher rod angle
Rebalance, find 7.0 rods, or go aluminum rods if they will fit