My 340 build

MoparMark91 said

I appreciate a lot i do, i nust have thoight about the cometic for the exact reason of being able to tweak the quench even better and have always wanted to try cometic honestly. In the picture it looks pretty good im trying to compare it too my picture of my block since im not next to it. I zoomed in on the surface of my block and i can see very fine lines but just curious if it would seal up. I am also running arp head studs,Maybe ill stop by my machinist and talk to him about if he mills it to a certain grit or something?

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Ok, that is not what I think of when I say rough surface finish. Your surface looks like what you get with a stone and there is nothing wrong with that.

It's not a mirror finish, but that will seal Cometics too.

Maybe I should go see if I can find what I'm mean by rough surface.

I'm all for mirror finish. My heads and block were damn near mirror finish and I used Fel-Por gaskets. They are leaking yet. I'm sure when I get home tomorrow they will be puking coolant right on the floor now that I typed typed that (thankfully it's Evans coolant so that's only 40 bucks plus shipping a gallon).

I've also finished and ton of surfaces with a stone. And none of those ever lost a Cometic. One was a 300 inch blown gas Comp Eliminator engine. 10:71 blower on gas. He was shifting at 9400 and crossing at 10,200. I know because I've seen downloads from 100 of his runs. Ex Pro Stock guy. Probably the best natural driver I've ever seen.