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Help!! machine shop botched fire ring job
I blew my brand new head gasket. I just got finished measuring the fire ring grooves the machine shop cut in my head. I pulled out the instructions that came with the fire ring gasket set that I gave to the machine shop. The spec called for 4.508" O.D. +/- 0.001" the closest they got was 4.529" and the farthest they were off was 4.599". Are you kidding me? with a tolerance of one thousandths they were off almost a full tenth. The fire ring is only .105" thick. The groves are supposed to be .120" wide and they varied from 0.115" to 0.126" 
Now to see if I can find a way to salvage my brand new ported head. Given that I dont have any consistency in grove size and vary from 4.529" to 4.599" what can I do to make this head usable.
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98 12v 4x4, 215hp pump, DDP stage 2 inj, #10 plate. 3k gsk, georend trans, ported fire ringed head W/ 110# V.S., PDR cam, II 62/12/65, AFE stage 2, 4" exh, 4" lift w/ 35's, lukes link, DSS steering brace, ATS exh. manifold, PosiLok, 4w disc
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