in theory the engine can becaome more responsive and have more power with lighter pistons alone, This is due to a less inertia losses.
Loki Boyracer: 4age cranks are fine even with a severe amount of abuse, balancing might help but they sure as hell aint a normal weakness. As for the ARP studs in alloy blocks, I don't know about that but the 4age block is cast iron...
