Cracked block

might be fixed , but not good enough to beat on , if it is a trailer queen fine , but if you really drive it forget it . Keep the new block , you will need it
Best let 'em explore this....kinda reminds me of the old country comedian, Jerry Clower, talking about kids learning....."Go ahead and let him pull that 100 lb TV off the table onto his head....he won't do it again!"