Tim did you check the lifter bore clearance? I forget and am too lazy to read the whole thread over again

Yes.. .012-.015 and I thought tight, Johnson lifters told me .008-.015 is sweet spot ... So I didn't mess with it, lifters are free moving I pulled a couple valves seem like not much clearance there, but the shop has to measure...

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God FF - that makes me sick. I just got my second one fired off the other night and am so nervous something like this could happen in the first few hours. Good luck man, you've got my sympathies....

If you have 1 piece rear main seals and end up being able to just replace 1 piston and fix the head, check make sure it didn't push the seal out. I've had that happen what a mess lol

It's coming out and apart from what I am reading afr heads cone with .012-.016 guide clearance... Not enough for marine endurance, I am not a happy camper I would have addressed that if I was told!! I was told bolt on ready....

Wow this sucks. Just got home and seen the update. Did u feel and here it go? Was it on the ride home?

Is that one of the ones u had plug problems with?

Yes but unrelated issue

Eather way this sucks r u going to brake down both blocks or just the one