i have a 99 Z71 with the 5.3 and i was wondering what heads i have on there from the factory, and if i upgrade wut should i do. port and polished or what

 

Head work will help but it really should be one of the last things to look at. Have you got all your supporting mods done?

 

na not yet. right now im tryin to figure out wut all i need 2 do and prioritize

 

wut should i do if i decide 2 get heads or do head work

 

id say before you do the heads consider

-cam
-gears
-longtube headers and offroad Y pipe (LTs & ORY)
-tune
-converter/supporting trans mods
-electric fans (i got mine from an LS1 Fbody for around $50 and purchased the Nelson Fbody Wiring Harness which is a great easy to use product)

then maybe when youve got most of that done like Trever1T said start workin on the heads