camarokid6771

66k mile long block, I was planning of opening up the ring gaps, ls9 head gaskets, head studs and having a keyway cut in the crank.

I have both cams here to pick from which is the better choice?

I also have yellow ls6 springs and comp 921 doubles here to pick from

raceweight will be 3000-3200lbs. headers are 1-7/8

NOTE: this is a temporary motor to play and learn with. I already have another LQ4 here to build up properly with good sh|t.

ive also thought about doing nothing to it and letting it eat LOL

ZO6Ted

IMO no contest...LS9. Had the LS6 and loved it but you need more.

Vortec350ss

iTrader: (20)

Grab some LS3 heads while you're at it and crank up the boost.

07 Z71

iTrader: (44)

Ls9 imo

zero2sixT

iTrader: (4)

do this

LowSilver

iTrader: (1)

I'd go LS9 out of the two choices. Also, why not just do ARP head bolts over studs and save some $$$ there?

-Kenny

old motorhead

iTrader: (10)

Of the two, LS9 for sure. If you're going to swap the cam anyway, I wouldn't use either. If someone gave me either one, I'd sell if for what I could get and go custom. On a 6.0L, there's no down side to a low to mid 220's intake, low to mid 230's exhaust, and a 115 to 118lsa with appropriate advance. Perfect manners and more power are there for the taking.

A custom cam is pretty cheap in the grand scheme of things. Lots of value for the buck right there.

3 to 3.2K race weight? Sounds like a fun project. Big boost just off idle in a light *** ride is all kinds of fun!

03sierraslt

iTrader: (22)

QI agree with all of this. No doubt. Thus my reasoning for my cam specs. 224/236 115

Vortec350ss

iTrader: (20)

I'll echo Pat and Motorhead on this one. There is so much to be had from a different cam.

terravast4

iTrader: (25)

i agree...i even feel my gt2-3 is on the small side. wish i went bigger