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#1 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Hooker 73-87 GM truck LS swap system
Hey folks. I just signed up here as a user last week for two specific reasons, one of which is to support my own squarebody addiction (I've owned 3 and currently am working on a 79 C20 project)and the other is to build a thread to provide information about the new Hooker LS swap system of components for these same trucks. I want tell you up front that I'm the design engineer at Holley who's responsible for developing all of the Hooker LS swap components, which will explain why I will only be sharing technical, operational, compatibility and fitment information here...I'm not very good at selling things, so I stay clear of that segment of the business.
I've been sharing the same information and pics you'll see me post here on another popular LS enthusiast website for quite a few months regarding this set-up and noticed that it was not trickling over here for the collective benefit of the members here, so I did some prodding within Holley management and convinced them sign-up as a sponsor here so that I could have the freedom to share information freely with anyone who is interested in reading or asking about it. I think that's a good start to the introduction, so let me get the meat and potatoes listed for you that will give the basis for formatting questions and comments that you may want shared with other members here. The direction behind the design of this Hooker LS swap system of parts was the same as it has been for all of the Hooker LS swap systems that have come out over the last 3 years, which is to say that every component is designed with the knowledge of how in would affect the fitment and function of every other part in the system. An example of this would be the necessity of the transmission crossmember to have the highest exhaust passage clearance available in order for the headers and exhaust systems to be able to provide the best available off the shelf ground clearance under the truck. I'm feel I'm getting a little too wordy, so here's what's available and some overall photos that show the components installed: 1. Specific factory clamshell style engine mounting bracket kit. 2. 1-3/4" and 1-7/8" long tube headers- in mild steel and stainless steel 3. Cast iron LS exhaust manifolds with available exhaust system adapters 4. Transmission crossmember compatible for installation of a 4l60-4L70,TH400 ,2004R, 4L80-4L85, T56 or T56 Magnum transmission in your truck 5. 2.5" and 3" stainless steel exhaust systems with rear exit or side exit tips Remember that all the above components are bolt-in installable with one another in your driveway. And the photos to come... [IMG] ![]() ![]() ![]() ![]() ![]() ![]() ![]() Last edited by N2TRUX; 12-31-2015 at 10:55 AM. |
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#2 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Hooker 73-87 GM truck LS swap system
At least your up front about working for them. I don't mind reps as long as we know where the confirmation bias comes from
![]() Anyway, I know the headers are an issue that gets a ton of attention around here. If you can help confirm deny their fitment on other years I know it would help us a ton. I'm in a 66, but with a 72 crossmember/suspension. Some here have used the 73+ stuff to great result, others say there are clearance issues. If you have input on that, I'd appreciate it personally.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING ![]() |
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#3 | |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
Quote:
As far as fitment confirmation of these headers on any earlier model year of Chevy/GMC truck is concerned, I'm afraid I'm not much help on that one either way as I've not had the opportunity to test fit them on anything other than multiple year squarebody trucks. I feel in time we will get around to developing parts for the earlier trucks, but I don't know when that will be. |
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#4 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,634
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Re: Hooker 73-87 GM truck LS swap system
Welcome aboard..are those just teaser shots of your truck? How about some whole truck pics..it looks good...I had heard holley was working on headers that required no frame cutting..most of us had to cut the frames on our square trucks.I know a big issue I had was clearing the manual clutch z-bar linkage when looking for headers and wound up with a set designed for a hummer..I still had to mod a bunch to make it work ..my next 2 projects will be the ad chevy trucks so don't forget about us either.
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#5 | |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
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#6 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: Hooker 73-87 GM truck LS swap system
Thanks for posting! How about some prices,
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#7 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
Pricing will depend on where you buy the parts from, so there is no black/white answer to that popular question. The C10 truck LS swap application is highlighted on the home page of the Holley website currently, so it's real easy to browse through all the available parts and get part numbers that you can use to check pricing from various sources.
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#8 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
For those of you who like to read or crave more info, here's a PDF that covers the technical and compatibility characteristics of the components...
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#9 |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: Hooker 73-87 GM truck LS swap system
How does the factory LS A/C compressor work with all of this? Can it be retained in its factory location without cutting the frame if the Holley clamshells are used?
__________________
Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#10 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
The engine brackets are compatible with the later factory truck compressor that does not have the rear sensor on it, but the edge of the front lip of the clamshell mounting brace on the truck will need to be trimmed slightly to clear the compressor.
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#11 |
Senior Member
![]() Join Date: Jul 2012
Location: Oblong, Illinois
Posts: 7,028
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Re: Hooker 73-87 GM truck LS swap system
I really do like the system application with these parts. It saves a ton of research and fabrication time plus eliminates the frustration of having parts that don't fit...not to mention cost. Nice job toddoky!
Can you post more pictures of the red truck? Looks really nice. |
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#12 | |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
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#13 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,634
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Re: Hooker 73-87 GM truck LS swap system
Good looking square...
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#14 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
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#15 |
Registered User
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
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Re: Hooker 73-87 GM truck LS swap system
Toddoky , I am interested in one of the hi-ram intakes . I am wanting to run the holley 300-123bk . I see you have one on the the red truck . I cant tell if it is the mid rise or the hi-ram . Wanted to know if you have any info if the hi ram will fit under the hood . I have the flat plates on mine with stock stands . I could not fine any info here or else where . I know you have your mounts on this truck . It looks like it has good clearance if it is the hi ram .
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#16 | |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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#17 | |
Registered User
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
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Re: Hooker 73-87 GM truck LS swap system
Quote:
I really wanted to run the high ram . The low rise is not a option for my engine upgrades and power level . The holley system was not out at the time I did my swap or I would have used it . I look forward to getting my exhaust . I ordered the 3" system behind the rear wheels last month . Last edited by homemade87; 01-11-2016 at 08:55 AM. |
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#18 |
Senior Member
![]() Join Date: Jul 2012
Location: Oblong, Illinois
Posts: 7,028
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Re: Hooker 73-87 GM truck LS swap system
Beautiful truck! Thank you. A bit off topic...I see two fuel tanks and was wondering what he used for a pump? Guessing one external Holley plumbed to both tanks?
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#19 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
He's actually running in-tank pumps on both sides. I've asked him to monitor this thread so that he can answer specific questions you guys might have about his truck, so I'm sure he'll chime in and let you know more specifics about how he set up the fuel system.
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#20 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,634
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Re: Hooker 73-87 GM truck LS swap system
Well he did a dang fine job on it..I've seen "store bought" trucks that don't look that nice
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#21 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
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#22 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Hooker 73-87 GM truck LS swap system
Sorry to Change the subject from trucks to cars, contacted you guys about a year ago anything happening with conversion for chevelles? Once again sorry guys but since your on here I don't have to go to ls1 tech.
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#23 |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
As a matter of fact, I'm getting ready to roll into the development of 68-72 A-body swap components in about a week, so the timing of your question is quite good. If your interest is in regards to the earlier A-bodies, they have not yet been put on the schedule.
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#24 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Hooker 73-87 GM truck LS swap system
70 chevelle for me been waiting for a while. That's awesome. Can't wait to get this car back on the road. My first car at 16 now 48 think it hasn't been on the road since 19. Will your cast iron exhaust manifolds be equated in with this package? I'm sure headers will be designed for this application. Just curious not all of us may want headers.
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#25 | |
Registered User
Join Date: Jul 2015
Location: Bowling Green, KY
Posts: 264
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Re: Hooker 73-87 GM truck LS swap system
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