Adding 22 cubes,,, power increase? 528 to 550

I might would check clearances with the cam retarded up to maybe four degrees. But I doubt with those lift rates that it’s going to be “asking” for more camshaft. With the huge ports and valves and fast lift rates it will respond well to the extra piston velocity at TDC and BDC. You should see more significant changes to the fuel curve by changing stroke and rod ratio than would be netted from a 22 cubic inch displacement increase in a larger bore size. Of course, how much more significant is a good yardstick of how well it’s working.