It won't crack .
If the oil temp doesn't exceed 300 during the hardest running then don't use an oil cooler, dont add any foo foo frills that will make it more difficult for the pump to stay primed and feed the engine.hot oil is better than none , or a bunch of bubbly oil from lines running everywhere.
cylinder wall integrity is a concern for pure racing , you should worry more about bearing type , clearances ,and getting rid of the factory valves and rod bolts.
YOU WANTED THE BEST ?
WELL THEY DIDN'T MAKE IT !
SO HERE'S WHAT YOU GET !