Hooker 73-87 GM truck LS swap system

[solidaxel]

Thanks for the intro. we will be watching for the "Latest" from Holley.

My questions at the moment are for your acc brackets for alt and PS for a new #19301326 engine that does not have any front Acc. equipment,
At the moment AC is not in the build

[toddoky]

Originally Posted by solidaxel

Thanks for the intro. we will be watching for the "Latest" from Holley.

My questions at the moment are for your acc brackets for alt and PS for a new #19301326 engine that does not have any front Acc. equipment,
At the moment AC is not in the build

I'd be glad to talk about the Holley accessory drive brackets; what specifically would you like to know, the part numbers?

[solidaxel]

Everything involved for mounting the Alt. and PS belt bolts idler, except the water pump and balancer

[toddoky]

Originally Posted by solidaxel

Everything involved for mounting the Alt. and PS belt bolts idler, except the water pump and balancer

The basics of what you'll need are as follows:

1.) alt-p/s bracket, Holley part no.20-135
2.) idler pulley, Holley part no. 97-150 or GM part no.12564401
3.) tensioner pulley, GM part no. 12569301
4.) p/s reservoir, GM part no. 26046502...and bracket, GM part no.12555222

You'll have to supply the alternator and p/s pump going this route, or you can buy the Holley 20-143 kit that includes the alternator and p/s pumps.

Figuring out the belt you'll need is a process that is comprehensively described in the instructions included with the Holley brackets (you can access the instructions on the Holley website if you want to pre-read them).

[Advanced Design]

Ok, I am officially impressed. You work for Holley, it is Sunday afternoon and you are helping one of our own with the brackets he needs. Great service! Though hope you are getting down time for you.

Now I am going to buy something from you guys...maybe the Terminator system for my current build...don't know yet. Probably brackets I need for the build for sure.

[toddoky]

Originally Posted by Advanced Design

Ok, I am officially impressed. You work for Holley, it is Sunday afternoon and you are helping one of our own with the brackets he needs. Great service! Though hope you are getting down time for you.

Now I am going to buy something from you guys...maybe the Terminator system for my current build...don't know yet. Probably brackets I need for the build for sure.

I hopefully become thought of as an individual member here like everyone else; my ability to provide information or help regarding Hooker or Holley products is something I'm happy to provide any day of the week. If you do make a purchase of any Holley product, myself and everyone else who works at Holley appreciates it greatly.

[indymachinist]

Just thinking aloud here... I (and probably others here as well) would love to see more of the behind the scenes development and production of these swap parts. The cad, prototyping, casting, machining, bending, etc.

Is that something that would be allowed? I understand the inner workings of things like this can be pretty secretive but as a machinist I like to see the process.

[toddoky]

Originally Posted by indymachinist

Just thinking aloud here... I (and probably others here as well) would love to see more of the behind the scenes development and production of these swap parts. The cad, prototyping, casting, machining, bending, etc.

Is that something that would be allowed? I understand the inner workings of things like this can be pretty secretive but as a machinist I like to see the process.

I don't think it's out of the question, but I'd have to get permission from management to post any internal photos or proprietary engineering materials. We actually do post photos of the various departments within Holley on our Facebook page, so it may be worth a visit to guys like yourself who like to see such things. I'll see what I find out during the week.

[1976K5CHALET]

My big problem is the cooling system. No body makes a radiator other than the old school brass copper or newer plastic tank with aluminum core that will bolt right in. I've had a champion installed in my 90 Jimmy that was to short and said shop used the 73/80 low mount radiator bracket to hold it in. I ordered an LS swap radiator from summit and sent it back as well due to fitment issues. Judging by your pictures you have this cured. Is the radiator available to purchase yet?

DW

[toddoky]

Originally Posted by 1976K5CHALET

My big problem is the cooling system. No body makes a radiator other than the old school brass copper or newer plastic tank with aluminum core that will bolt right in. I've had a champion installed in my 90 Jimmy that was to short and said shop used the 73/80 low mount radiator bracket to hold it in. I ordered an LS swap radiator from summit and sent it back as well due to fitment issues. Judging by your pictures you have this cured. Is the radiator available to purchase yet?

DW

The radiator in the red truck is made by CRS...make sure you're sitting down if you go looking for pricing information.

[1976K5CHALET]

Thanx for the advice. This issue has been the biggest pain in my rear end of this entire swap.

DW

[toddoky]

Originally Posted by toddoky

The radiator in the red truck is made by CRS...make sure you're sitting down if you go looking for pricing information.

I incorrectly stated the name of the source of the radiator earlier...the correct name is C&R Radiators.

[Misled]

I bought the 20-137 kit. I keep hearing of an install kit I will need. Can you advise what that is (and part number) please?

[toddoky]

Originally Posted by Misled

I bought the 20-137 kit. I keep hearing of an install kit I will need. Can you advise what that is (and part number) please?

Depending on the engine you are installing the kit with, you may need to use an available spacer kit to match the fore/aft offset of the Holley components with the water pump and balancer on your engine. What LS engine are you installing?

[toddoky]

Originally Posted by Misled

I bought the 20-137 kit. I keep hearing of an install kit I will need. Can you advise what that is (and part number) please?

.

These are the part numbers of the Holley installation kits; pick the one you need based on the water pump/balancer offset you have on your engine...

Corvette/CTSV - 21-1, F-Body/GTO- 21-2 or truck- 21-3

[RUN GMC]

A couple of thoughts here.....first I saw this truck awhile back on the Power Tour at the Holley display I think way before last year this was the truck that got me started looking for my 87 GMC that I have now....it was very nice motivation for me...........will you guys have this on display when the Roadkill Road Show rolls through next Sunday kind of made plans to jump in as they drive from Nashville to Memphis(working Sunday or I would roll up to Bowling Green)........I believe these are pics I took in Knoxville in 2014........

[toddoky]

Originally Posted by RUN GMC

A couple of thoughts here.....first I saw this truck awhile back on the Power Tour at the Holley display I think way before last year this was the truck that got me started looking for my 87 GMC that I have now....it was very nice motivation for me...........will you guys have this on display when the Roadkill Road Show rolls through next Sunday kind of made plans to jump in as they drive from Nashville to Memphis(working Sunday or I would roll up to Bowling Green)........I believe these are pics I took in Knoxville in 2014........

I'll ask the owner to be sure, but I don't think he has plans to show the truck anywhere before LS Fest.

[solidaxel]

Ok, I am officially impressed. You work for Holley, it is Sunday afternoon and you are helping one of our own with the brackets he needs. Great service! Though hope you are getting down time for you.

Now I am going to buy something from you guys...maybe the Terminator system for my current build...don't know yet. Probably brackets I need for the build for sure.






.......................... he stated it !!!

[toddoky]

Originally Posted by solidaxel

Ok, I am officially impressed. You work for Holley, it is Sunday afternoon and you are helping one of our own with the brackets he needs. Great service! Though hope you are getting down time for you.

Now I am going to buy something from you guys...maybe the Terminator system for my current build...don't know yet. Probably brackets I need for the build for sure.






.......................... he stated it !!!

I'm glad I was able to help you out.

[Daaaanz67]

Ok enough talk lets get working on that chevelle stuff just kidding thanks for all the info especially on a Sunday. I'm using the cast iron manifolds on my conversion been on my truck for three years now not driven in the winter to much especially in the rain at all. I was just wondering what would have caused my black ceramic finish to look like this? It was heat cycled when new. Really love the fit but disappointed in finish.

[toddoky]

Originally Posted by Daaaanz67

Ok enough talk lets get working on that chevelle stuff just kidding thanks for all the info especially on a Sunday. I'm using the cast iron manifolds on my conversion been on my truck for three years now not driven in the winter to much especially in the rain at all. I was just wondering what would have caused my black ceramic finish to look like this? It was heat cycled when new. Really love the fit but disappointed in finish.

I'm personally not a fan of ceramic coatings (from Hooker or any other source) as I've never experienced good long-term results with their usage from a cosmetic standpoint. As long as the coating doesn't exhibit any signs of debonding from the surface then its primary engineered function as a thermal barrier has not been compromised.

[Matt Cramer]

Ok, something I'm curious about on '67-'72 trucks. Bit of a weird question, and I can understand if you don't have the answer.

I made a set of homemade mounts that have similar bolt positions to these: https://holley.com/products/ls_power...parts/12622HKR

Then I put the stock engine stands in the six cylinder position so the engine mounted in the same location. I used a set of used 2010 Camaro exhaust manifolds, and had to do a lot of sawing and welding on the stock engine stands to make them clear everything.

Would the Hooker manifolds have cleared this?

[toddoky]

Originally Posted by Matt Cramer

Ok, something I'm curious about on '67-'72 trucks. Bit of a weird question, and I can understand if you don't have the answer.

I made a set of homemade mounts that have similar bolt positions to these: https://holley.com/products/ls_power...parts/12622HKR

Then I put the stock engine stands in the six cylinder position so the engine mounted in the same location. I used a set of used 2010 Camaro exhaust manifolds, and had to do a lot of sawing and welding on the stock engine stands to make them clear everything.

Would the Hooker manifolds have cleared this?

I've not done any test fitting of any type of parts on 67-72 trucks, so I unfortunately don't have an answer for you either way.

[Houston Ben]

Sooo...no worky for 6L80?

[toddoky]

Originally Posted by Houston Ben

Sooo...no worky for 6L80?

There is no direct accomodation for that trans, but because the location of its mount lies between a TH400 and a 4L60, it would be easy enough to fabricate an adapter bracket to pick up its mount off of the Hooker crossmember.