my 5.0 cobra has an e-303 cam I dont know if I shoud port my stock heads or go with new ones, and if you think i shoud get new heads whitch ones do you think I should get?
Jeff

 

you have the gt-40 heads right? if i was you i would get them ported and polished install fresh valve springs and roller rockers (don't cobras already have them?) and throw 'em back on.

it will be cheaper than getting new heads and you'll notice a nice gain.

 

thank you dude