I want to clean up this head I have before putting all the new internals in. I realize I shouldnt sand blast the top where the cams and lifters are but what about everywhere else? Is it ok to blast the combuston chamber part? Valve seats are gonna be remachined anyways. What about in the intake and exhaust runners, is it safe to blast inside those as well?

Any cleaning tips appreaciated. Thanx

BTW, I indicated the block mating surface of the head and its out of flatness by aprox .003" here and there. I think thats not too bad. Is this acceptable or should I deck it a couple thou anyways?