I need advice for a good street performance/economy slant 6

memike, do you have a link to that thread?

Here it is and welcome if I missed you in the welcome wagon :thumblef:
Go to the last page and work yourself back as far as you like, it will get to the plugs I went to and set up and exhaust to my fresh air system :book:
http://www.forabodiesonly.com/mopar/showthread.php?t=41794