can any of you recomend an auto machine shop that will do a good cylinder head overhaul on a 91 si head? i'm talking about a check for cracks, 3 angle valve job and valve guide replacement if necessary. most of the shop around my area dont turn out the quality job that i want. note that i dont want cheap, i'm willing to pay for good work. i'm even willing to mail my head out to have the work done. i don't care where the shop is as long as the work is good.