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I don't have any heads for sale, but as an FYI (this isn't going to help your valve tap,but I thought I had a valve tap and it turned out to be an exhaust leak):
93-97 LT1 heads are all the same. There are a few cases ( Somewhat common ) for the 93s to shear off the outer bolts on the manifolds. It's said the some of the 93 either had bolts were too long and bottomed out in the heads, or the holes in the heads were too shallow, either case, this allowing the manifolds to twist under the torque of the engine. Over time this weakens the bolts and they break.
If your outer bolts are the one that are broken, an easier fix is to install MAC shorty headers. There are two sets of outer holes on the LT1 heads. The shock headers use the inner set of holes, the MACs use to the outer holes.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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