Thank you for the insight. It seems still nobody is willing to give the B21 the time of day. I respect your experience bigt61. I really don't understand how it can be such a lemon if it's already made it 220K with virturally no problems at all. Sorry but I'm still not convinced swapping out the block is the only way to achieve success. Still hoping there is someone out there who has the answers I am looking for. Thank you all for your input.