I have seen only 1 head and cammed 6.2,if there are more with posted ETs correct me or link it.The dubi guy with the black yukon,he broke into the 12s

I am kind of a cheap bastard, but try to maximize performance per dollar,I have a recipe in mind to get my 5800 lbs CC 4x4 into the low low 13 range,13.0 would be great.
A budget head and cam would be the LS9 cam and parts,thats what about $250 for cam, springs, cover, misc.

Next would be for me to pull my heads,strip them down,mark everything so all parts go back where they came from.Find a LSx shop that has a good reputation ,have them CNC porting done,can that get done for $600-$675??(few years ago it was) then shipping $100 est.almost forgot head gaskets and bolts.

This is what I have in mind,not sure how realistic it is,like to hear your comments.

 

Texas Speed cnc's for about 800.00

Also there is more to be had out of a bigger cam than that LS9 cam unless you are going to go supercharged later. I had the same cam but decided i wanted to keep the current cam bc i like the mph vs e.t

My heads are bone stock other than a .020" mill. Ive been 12.73 @ 105 with a 3600 converter and a 4spd. Granted mine isnt a 4wd but its full weight

 

Amen, brother!