Guys I found this light scuff taking one of my heads of last night. You cannot feel it with your finger but if you drag a finger nail on it you can just barely feel some light rumbles. These are GM ZZ572 crate motor bottom ends that have never been apart. They probably have 125-130 hours on them. Engine never burned any oil or smoked. I was hoping not to have to get into the bottom ends. What do you guys think??

If they are out of the boat I would pull that piston and look at it. What are you upgrading?

Going from NA to a 12-71 blower setup.

My old boss had 425ho in his boat loaded up on choke and washed the rings out of it that was the only time I ever saw that and than came Black Death.

Ok 12-71 I would re ring both motors probably need more end gap anyway or you might be sitting on the side lines this summer. How much power you looking for?

Probably around 950 on 8 pounds.

Can you do the bottom ends yoursel if you can won't cost to much if nothing else is wrong. Definitely would rering it set the gaps rite for that power.