Surface finish on block - useable or no?

[Bimmubishi]

Hi Guys, I'd like a consensus on this one. A customer brought me this motor to be built. He had it machined in his town. What do you think about this surface finish with a metal headgasket? I can stripe it with my fingernail. It's nice and consistent but the grooves are deep. Please let me know what you think. I don't want to build a turd. My impression was that an RA of about 15 was acceptable which is I think smoother than this.

Thanks

Alex

 

[grocery_getter]

If you can catch it with fingernails....

 

[IncorpoRatedX]

I'd go composite head gasket with studs on that one..

 

[4thStroke]

Do you have a lapping block that you can make a few passes with?

 

[Bimmubishi]

I sent the block out for surface grinding. Thanks for the opinions guys.