**600hp sbm block limit? Or is it bs!!**

I would love to bend the ear of an engineer that understands crankshaft balance and the value of a fully counter weighted(ccw) crank and how much stress it takes away from the block due to rhe outboard counter weights no longer having to balance out the center cylinders. I noticed in my 2432 bob weight 4.15 stroke megablock that the difference was enough to eliminate cap walk and fretting at 850 hp and 7200 rpm
So how much could it extend the life of a stock smallblock casting? My WAG ( WILD ARSE GUESS) is maybe another 150 to 200 hp, given the rpm didn't go a lot higher? Then block life might be limited by cylinder wall strength, and head gasket sealing?