loosews6

iTrader: (1)

ls3 heads or stay with cathedral port heads and 4150 intake or get the ls3 super victor with 4500tb and ls3 heads 300 shot or more race weight 3000
hyd roller

NitrousExpress

iTrader: (4)

I would use the LS3 heads. One of the guys in house built a little 408 with an LS3 top end and it made over 500+ to the wheels on motor. What type of cathedral ports were you considering?

-Garrett

loosews6

iTrader: (1)

Tfs 245s

CravenPerformance

LS3 heads
4500 flange super victor
4500 throttle body
Induction Solutions Real Street Plate or NX Billet Cross Bar Plate with a 1" open spacer under the nitrous plate.

loosews6

iTrader: (1)

ls3 stock casting or u think aftermarket with a lot of nitrous

Petey-Pop-383

I used out of the box LS3's and went 9.40s on a .028 jet in a fogger.

loosews6

iTrader: (1)

what ls3 heads?

Mean87SS

iTrader: (21)

Meaning factory GM.

Rise of the Phoenix

iTrader: (27)

Factory heads, I'd go with LS3 heads, but id you've got it in the budget for aftermarket castings, go with some AI Dart/RHS heads from AI or some TFS heads.

magnum-gto

We use the Trick Flow 245 cathedral port heads, but then
we are a street car with just occasional trips to the track.

CAMSTER

iTrader: (10)

245 Trick flow will do better job than stock ls3 cause their much higher flowing exhaust ports, however if I had my way I use the following heads:

http://www.trickflow.com/partdetail....1&autoview=sku

Dynospeed

iTrader: (3)

My car ran real strong with the tfs 245's. I would probably go with
1. Tfs 255 ls3
2. Tfs cathedral
3. Ported lsa heads on a budget except I feel heads are a terrible place to save $$$ on a build.

Petey-Pop-383

I used box stock LS3's from GM with upgraded springs and hardware.

I want GenX255's for my next motor.

loosews6

iTrader: (1)

how are the genx255 out the box

StrokerTA

If you have TFS 245's, I would stay with those.. I'm not sure what kind of goal you are trying to achieve, but that is a better head than the Darts and we've gone plenty fast with those.
If you have nothing right now, I would get an LS3 super vic with 4500 flange, and get a set of Frankensteins version of the Trick Flow.

loosews6

iTrader: (1)

thats what I did got a set of ls3 trick flows 255 sending them to Frankenstein racing to get ported and getting ls3 super vic and 4500 tb and holley system with jeff prock dual stage dry set up....hoping for 5.30s car is 3000 race weight in 2000 mustang

Rise of the Phoenix

iTrader: (27)

What's the cost going to be to have Frankenstein port the heads?

loosews6

iTrader: (1)

U will have to call every head is different