Since we are on the subject...I have a 454 block that I had a roller lifter break in. It is cracked between the lifter bores in the cam tunnel...it didn't hurt the lifter bores just kinda crunched in a spot between the..sorta hard to see but it's there. It didn't leak water but you can see where the metal is pushed in a little .....guy at Schmidt Automotive in Indy looked at it and said he could put epoxy over it and do a partial block fill and it would be ok..but he couldn't gaurentee it would never leak.I was afraid to use it so I got a Merlin block. I hate to throw this one in the junk because it had very few runs on a fresh bore...but at the same time I hate to use it..if that makes sense..lol. Also if it is repairable is there an optionm other than the block fill? One that would allow it to be used on a street application?