It's interesting to note that the cooling system also acts as a hydraulic pressure vessel and also acts to a large degree as a fluid dampener around the cylinder walls. A lot of people tend to overlook how effective a properly functioning cooling system is/can be. Hard block diminishes this ability to some extent but conversely reinforces the mass around the crankshaft webbing.

on the street there tends to be a lot of wasted momentum in terms of what percentage of developed power actually is applied to load and gets to the ground. the more well-scienced your car hooks the more Percentage of power (load) you subject the block to.

If you hard block it I would run an oil cooler just as added protection against getting stuck in traffic in the middle of summer which is about the most taxing heat/thermal expansion a street motor is going to see. Not so much what heat it generates drag racing at WOT (because there is a long anticipated cool down period) but more a possible inability to dissipate heat under extreme and prolonged conditions.