I just bought a 1998 GMC with a 5.7 liter v8, extended cab. pretty much its completely stock...i havent done a thing to it yet being that i'v had it for 2 weeks...i want to put on:
-AEM intake with a K&N air filter
-flowmaster super 40 series true dual exhaust
-Jet performance stage 2 chip
-venom super cool fuel pump
-venom performance module
-4-inch fabtech spindle lift
-33 or 35 inch tires

ANYONE HAVE ANY SUGGESTIONS FOR POWER OTHER THAN WHAT I HAVE?????

Intake Manifold Gasket....

Im not completly sure about this but if it is TBI Injection then i would get a TBI Spacer, also a nice set of Ceramic Headers, You can go with just a Painted style header but i would deff spend alittle more and go wit the Ceramic Coated Headers. Also, since your year of truck i would go with a Jet Power Chip, and also a Differnet thermostat.

I hope this helps you out and good luck with your pickup peace.

Try a nice shift kit too, TRANSGO has a wicked reprograming kit as well as shift kits "AMAZING" On mine to Ialso replaced the servos with a Corvette servo and it's good to do at the same time since you have the pan off to. Since your spending that kind of money you should get a deep dish tranny pan to keep it cool. Remember " EXPORT THE IMPORTS"

Nelson Tune: http://www.nelsonperformance.com/