I've installed the walbro 255. Ordered new fuel lines and an fittings for fuel supply to fuel rails on the Holley intake. It has the 2 fuel lines (one supply and one return) so we figured what fittings we'd need for intake and all and ordered it.

 

Maybe you should have started out with what you already bought lol
That hiram like the others said wont help a whole lot. Those short runners are gonna be s turd for torque and bring your rpm range up quite a bit.
Youd be nowhere near the actual capabilities of it though.
What do you already have and what do you not have also what is the purpose for the truck?

A true track, while less $$ and is a great limited slip, isnt a locker so keep that in mind. It sometimes works the same but sometimes it actually does what its designed to do. Working the brakes can help, but again its not a locker. If you are looking to make a truck for the strip somewhat the eaton posi or detroit locker are your best bet. All 3 are owned by eaton anyway.

 

I already have all the parts mentioned. Just have to find time to install everything. Truck is intended for street strip. Will see it's time on the track but more so on the road. I could always send intake back to summit racing in lieu of the trailblazer ss intake if you think I'll be giving up a lot of power and torque.

 

Ideally you should send it back...and stop buying from summit We have nearly any new part you can imagine on hand AND the tech support to get you a complete combo. No tbss intakes but there are plenty floating around.
If you need anything else let us know, pm me, or email rpmspeedtech@gmail.com.

 

Again, tbss and ALL 4 bolt intakes are the same. Pick your. Fuel return or non and buy a used intake.
Plenty of 100% complete intakes from 200-270$ forsale all the time.


Just fyi, look at the throttle bodys. Early intake is 3 bolts on the TB.
The big intake has 4 bolts. Easy to tell by eye balling the top of the TB, if a stud is top center its three bolt, anything else is 4 bolt

 

It may not be the best way to do it but he can use a 4 bolt to 3 bolt adapter plate.
If he swaps to the 4 bolt in his 03 truck itll need the torq rush xlink adapter also.

 

As far as stock return style rail for nnbs intakes, o have never seen one unless you mean a modified stock rail.

 

You can probably use the Holley fuel rails. Just make some brackets from angled aluminum. Mount the brackets to the intake itself.

This is how I did it. I can post better pics if you need them. The factory fuel rails mounts are cut off.

This would be a better setup, imo, over making the factory stuff work. I also run an afpr. It is still mounted to the firewall tho.

 

Yess the three to four bolt adapter is a smart move as the xlink is junk half of the time and or most tuners dont know how to propery tune for it.
There are even rumors that the smaller three bolt TB on the four bolt intake make more TQ down low for a DD and looses very little up top.




Oem fuel rails may be ugly as a loaded baby diaper, but they can supply enough fuel for 99% of most engine builds.
Wasting money on holly rails is silly.
That money can be ised for something usefull such as the latest bushing trunion upgrade, given his cam is going to beat the **** out of the oem needle bearings.

 

I've seen very few xlinks mess up on their own.
Tuning for them is just like tuning for any larger tb. If the tuner cannot make it work, find another tuner really.

The smaller tb idea is just a rumor unless you put it on a 4.8 maybe. The biggest issue is mismatc of parts and overcamming engines.

The nnbs setup seems to be your best bet.
We are working on a ported dorman truck intake VERY soon also with a few added features.