tho
I've done a conversion on a 98 Jimmy with just using Sy/Ty exhaust manfld/stock turbo/dp. And a Marine intake.
11,000mi on it with no issues. 150,000mi on the truck with stock engine. Runs 10psi all day as the wife's ddriver.
Lots of options depending on what you have.
What's up with the Chevelle? found the answer to why it's not running right?
Should be running a bit better than 17's

Shoot me a e-mail if your interested in pic's or info.
~Scott
UR50SLO@aol.com