ok thanks guys on another note what is the best exhaust system to put on my 94 z28 and do i have to have the cats on this car and what are some of the best upgrades for performance

 

read this.
https://camaroforums.com/forum/93-02-general-41/basic-modifications-tech-where-start-modding-25112/

for me (this is what ill have to go with the new motor) the best would be kooks headers, catted y pipe with a corsa system from the y pipe back.

to get heads, cam and intake done
http://www.elliottsportworks.com/lt1.html

for retuning the computer
http://www.pcmforless.com/index.php?...d=44&Itemid=40