I have to think that a long block from Merc is the way to go. I have seen powerheads online for 4800 with core. Should i go Merc only? I really want to do that, and that only. Just need some 2 cents from what the church has to offer. Is a rebuild by a vendor a bad deal? If it is not a bad deal who would you trust for a 300x rebuild. I do not know if I want to trust a rebuild that someone has done. I mean rebuilding an engine aka big block and a whacker might be different. It has to be right. The engine only lasted 2 hours or so and then dead, dead, dead oh yeah it was done twice by the same shop. Just want feed back. Not here to bad mouth anyone. I do not have records in my hands. Just going by what I have been told. Trying to get info so I can make a judgement on the new twins.