Just an FYI...my machine shop (Fowler's Engines of Columbus, OH) milled my TFS TW's .045" and milled the intake side of the heads as well in order to compensate for the head surface milling. The intake ports line up perfectly and I had just enough space at the bottom of the intake to the 'wavy' part of the block to seal it up with black RTV. This milling took my combustion chambers from 66cc to 58cc and resulted in overall compression change from 9.2:1 to 10.0:1.
Make sure you do all the calculations so that you end up with the proper compression that you're looking for based on chamber cc, etc.
Good luck,
E
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1991 5.0 LX Coupe - 40,750 miles
331 cu. in. / Tremec 3550 / BFG Drag Radials
12.22 @ 114.31 mph - w/1.89 60'
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