Leave it alone!
With that many miles you going to cause yourself allot of greif!
Timing chain is probably stretched, lifters and springs proabably can't handle a more aggressive cam, and the bottom end may not like the extra cylinder pressure.
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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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