Hammersly did your block crack also. I plan to call the guy at cummins to see about covering mine under warranty, I'm welling to do all the labor just want them to provide parts. If that does not work than I will be looking for a block or long block. Cummins724 and host of others have provided me with some info from my last post the one you posted on. If I come up with a some additional info I will pass it on to you. One guy on my post said he has a couple blocks, I will be contacting him also, I think it was farmboy or something like that. Good luck let me know what you find out. Dwayne