ITB. aka. Stacks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970 CST Short Wide** · 03-24-2026, 06:04 PM

Couldn’t Help Myself. Took 30 days to get them from Redux Racing in Australia. Going to take a lot of patience but my Tuner says No Problem
Sending the Manifold out to be Powder Coated then On They Go. Not looking for more power, if I get some that’s Great hopefully don’t lose any
I Just LOVE The Look
Wish me Luck

**Rickysnickers** · 03-25-2026, 09:38 AM

Very nice!!

**PbFut** · 03-26-2026, 07:41 AM

Just make sure the fuel rail stays in place. Ask me how I know.

**Palf70Step** · 03-26-2026, 08:20 AM

Looks good.

**1970 CST Short Wide** · 03-26-2026, 12:13 PM

Quote:

Originally Posted by PbFut

Just make sure the fuel rail stays in place. Ask me how I know.

On the LS1 it uses the original fuel rail so should be no problem

**1970 CST Short Wide** · 03-29-2026, 10:04 PM

Getting close.

**PbFut** · 03-30-2026, 11:31 AM

Looking at the setup, where is your ICV, MAP, MAT?

**1970 CST Short Wide** · 03-30-2026, 01:44 PM

Quote:

Originally Posted by PbFut

Looking at the setup, where is your ICV, MAP, MAT?

In the back and underneath the manifold

**1970 CST Short Wide** · 03-31-2026, 12:16 AM

Quote:

Originally Posted by PbFut

Just make sure the fuel rail stays in place. Ask me how I know.

I read your story about what happened. Did you rebuild?? And did you go back with Stacks ??

**PbFut** · 03-31-2026, 06:11 PM

I did rebuild. The damage was extensive. Hagarty, the insurance company was great to work with. They allow self repair and the process could not have been easier. I think they figured it was a total so anything they saved was worth it to them. I saved the title as well so no salvage.
I ended up replacing the hood and most everything behind the dash forward to the radiator. Since I was just finishing the original restore it was easier and I actually did things a little better the second time. I still run EFI but I did not replace the stacks. I took the funds for the ITB setup and the funds Hagerty gave me for my time and bought a new engine. The old engine was tired so I was not concerned about air filtration. The new motor was worth protecting so I went port injected with a TB in place of carburetor and a standard filter housing. Not as cool looking but good function. As far as performance, you won't get a thing for street use, but just like a Big Brake Kit, they look cool. One thing to note on setup. Get the EFI running. It doesn't need to be perfect. Then get the stacks flow matching as close as you can. Don't blow off this very important step. Then go back to your EFI and dial in your tune. Would not hurt to retest the flow one more time. Stacks are simple but easy to be out of tune and engine still run.

**1970 CST Short Wide** · 03-31-2026, 08:54 PM

Quote:

Originally Posted by PbFut

I did rebuild. The damage was extensive. Hagarty, the insurance company was great to work with. They allow self repair and the process could not have been easier. I think they figured it was a total so anything they saved was worth it to them. I saved the title as well so no salvage.
I ended up replacing the hood and most everything behind the dash forward to the radiator. Since I was just finishing the original restore it was easier and I actually did things a little better the second time. I still run EFI but I did not replace the stacks. I took the funds for the ITB setup and the funds Hagerty gave me for my time and bought a new engine. The old engine was tired so I was not concerned about air filtration. The new motor was worth protecting so I went port injected with a TB in place of carburetor and a standard filter housing. Not as cool looking but good function. As far as performance, you won't get a thing for street use, but just like a Big Brake Kit, they look cool. One thing to note on setup. Get the EFI running. It doesn't need to be perfect. Then get the stacks flow matching as close as you can. Don't blow off this very important step. Then go back to your EFI and dial in your tune. Would not hurt to retest the flow one more time. Stacks are simple but easy to be out of tune and engine still run.

Thanks for the good info, Good to hear insurance was easy to work with.. The stacks for me are like a Bucket List thing, I’ve Always liked the looks and with more years behind me than ahead of me I figured What the Hell.

**PbFut** · 04-01-2026, 10:14 AM

Yes. It was exactly the same for me. EFI is not the plug and play most of the marketing hype says it is. Adding the ITB setup will increase the complications for good tune. Prepare yourself. It will be a Mt Everest type journey worth it in the end. I never got things to where I would call it complete. It ran good, but I wanted more before the fire caused me to give up.

03-24-2026, 06:04 PM	#1
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,499	ITB. aka. Stacks Couldn’t Help Myself. Took 30 days to get them from Redux Racing in Australia. Going to take a lot of patience but my Tuner says No Problem Sending the Manifold out to be Powder Coated then On They Go. Not looking for more power, if I get some that’s Great hopefully don’t lose any I Just LOVE The Look Wish me Luck Attached Images __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 Last edited by LockDoc; 03-24-2026 at 09:33 PM.

03-25-2026, 09:38 AM	#2
Rickysnickers Senior Member Join Date: Oct 2014 Location: Eagle, ID Posts: 3,406	Re: ITB. aka. Stacks Very nice!!

03-26-2026, 07:41 AM	#3
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 1,024	Re: ITB. aka. Stacks Just make sure the fuel rail stays in place. Ask me how I know. Attached Images

03-26-2026, 08:20 AM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 48,486	Re: ITB. aka. Stacks Looks good. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

03-29-2026, 10:04 PM	#6
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,499	Re: ITB. aka. Stacks Getting close. Attached Images __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

03-30-2026, 11:31 AM	#7
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 1,024	Re: ITB. aka. Stacks Looking at the setup, where is your ICV, MAP, MAT?

03-31-2026, 06:11 PM	#10
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 1,024	Re: ITB. aka. Stacks I did rebuild. The damage was extensive. Hagarty, the insurance company was great to work with. They allow self repair and the process could not have been easier. I think they figured it was a total so anything they saved was worth it to them. I saved the title as well so no salvage. I ended up replacing the hood and most everything behind the dash forward to the radiator. Since I was just finishing the original restore it was easier and I actually did things a little better the second time. I still run EFI but I did not replace the stacks. I took the funds for the ITB setup and the funds Hagerty gave me for my time and bought a new engine. The old engine was tired so I was not concerned about air filtration. The new motor was worth protecting so I went port injected with a TB in place of carburetor and a standard filter housing. Not as cool looking but good function. As far as performance, you won't get a thing for street use, but just like a Big Brake Kit, they look cool. One thing to note on setup. Get the EFI running. It doesn't need to be perfect. Then get the stacks flow matching as close as you can. Don't blow off this very important step. Then go back to your EFI and dial in your tune. Would not hurt to retest the flow one more time. Stacks are simple but easy to be out of tune and engine still run.

04-01-2026, 10:14 AM	#12
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 1,024	Re: ITB. aka. Stacks Yes. It was exactly the same for me. EFI is not the plug and play most of the marketing hype says it is. Adding the ITB setup will increase the complications for good tune. Prepare yourself. It will be a Mt Everest type journey worth it in the end. I never got things to where I would call it complete. It ran good, but I wanted more before the fire caused me to give up.



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