Their are thousands of these little engines out there in multiple applications doing a great job without issues everyday some with mega miles on them. The cracking blocks were the infamous #53 casting in which there was some failures but it was not every block and there was some warranty offered. The biggest question here seems to be whether or not you can live with a reduced speed going up and down grades with a vehicle bigger than a Honda Civic. Read through some of the posts with the HP vs Weight discussions and you will quickly realize 2000 hp in a 40,000 lb motorhome is way under powered because BillyBob could not pass a Maserati on I70 going up the grade to the tunnel. Tinkerer sorry you had one of the bad ones but $19k is not going to cover the bill if your kitty has a hemorrhage, they have had issues too! If a man made it, it will break.
