The problem is that in order to clean it up, you will end up with less than .043" on the even deck. It will have to be skimmed from one end to the other, so you might end up .040"-ish on that side, unless you clean both sides evenly. For a street motor, I think I would leave it and start building it. For Felpro gaskets, your surface finish is probably fine. If you were using an MLS type gasket, I might take a closer look.