Probably the most popular right now are Lloyd Elliott or Portpros. The L.E. packages seem to put out good numbers.
I had my heads done by GTP ( via IRS ) about 4 years ago, back then GTP was considered one of the best. I think he still is but he's prices are higher then what some of the other porters charge. My heads were originally Stage II for N/A. When I went with the SC I sent them back and had additional porting done done and freshened up. http://gtp-racing.com/
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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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