Re: Hooker 73-87 GM truck LS swap system
 

Thank you!!!!

Re: Hooker 73-87 GM truck LS swap system
 

Hi Toddoky,

Any plans in the near future to test fit any of these swaps parts for 73-87 4x4 K10 trucks, or develop some swap parts specifically for 4x4 square bodies? I'm building a 1979 GMC Sierra Grande currently and getting ready to put a LY6 6.0L LS engine in it backed up by a 4L80e. It's a K10 but I'm throwing a one-ton running gear underneath it with the Dana 60 axle in front and Corporate 14-bolt in back, both with 4.11 gears. I'd love to have a nice set of stainless steel full length headers, transmission crossmember, direct fit exhaust system with side exit etc. etc. for 4x4 trucks. I love the C10's but they don't do so well in a Montana winter.

Best,

Jeremy

I haven't heard of any plans to develop specific components for the 4x4 applications at this stage Jeremy and it would be tough to do anything beyond engine mounts and headers due to all the different transmission, transfer case and rear axle combinations used by everyone. The C10 Hooker components definately won't fit.
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Re: Hooker 73-87 GM truck LS swap system
 

Thanks for the reply. I totally understand. Wishful thinking I guess on my part since a lot of these LS engines people are swapping are out of 4x4 trucks like the LY6 6.0L I got out of a 2011 Chevy 2500 HD. I just figured it made sense but I see your point.

Do you know of any header applications that people have been trying for totally different vehicles that may fit with a little coersion into the K10's? I'll likely have to try that because I don't think I can afford custom built headers unless you know some place that will do it for $1,000 or less. Cheapest I found so far was $2,450 from stainlessheaders.com. Ouch! Or do you think a shorty, block hugger header or factory manifold off say the Corvette might be the ticket?

Re: Hooker 73-87 GM truck LS swap system
 

I would check out the Hooker cast iron manifolds if you are concerned about clearance. They are based on the E-ROD LS3 manifold if I recall, but hug the block nice and tight. I believe the part number for the uncoated version is 8501HKR.

Re: Hooker 73-87 GM truck LS swap system
 

Toddoky , Been looking for some 3" tailpipes over the axle side exit behind the tire. I see the ls swap kit in 3" has a nice looking set ( 70501415 ) . Whats the chances I can buy the tailpipe by it self . I have the rest of what I need just need the tailpipes .

The chance of that happening is zero; the tailpipes are only sold as part of the exhaust systems.
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Re: Hooker 73-87 GM truck LS swap system
 

Would you happen to know the part number, or year and model this compressor is from?

Also do you have a picture of how much needs to be notched?

Re: Hooker 73-87 GM truck LS swap system
 

The OE compressor number is 10S17F (the larger displacement 10S20F was also used in some applications). I don't have a picture of the notch...you only have to notch the flange lip on the front of the mount frame bracket.

Re: Hooker 73-87 GM truck LS swap system
 

Will both work, or just the 10S17F?

I've only validated the fitment of the 10S17F and don't know what the physical differences are with the 10S20F, if any.
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Re: Hooker 73-87 GM truck LS swap system
 

Toddoky,

Would you have the dimension for the distance from the verticle centerline of the engine to the outside edge of the compressor for the 20-133 r4 mount and 20-134 for Sanden mount?
I can't find them on the Holley website.
Thank you!

I don't have those dimensions readily available, but I can do a mock-up of the parts to get them for you...it will take a couple of days.
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Re: Hooker 73-87 GM truck LS swap system
 

Thank you. That would be very helpful in determining if those brackets will fit in the earlier trucks without cutting into the inner fenders. Your competitors have those dimensions readily available.

Re: Hooker 73-87 GM truck LS swap system
 

Page 2 of the instruction manuals for the complete accessory drive kits shows the dimension you are looking for.

20-136 R4 Complete Accessory Kit product page:
20-136
Deep link to instruction manual:
20-136 Manual

20-137 Sanden 508 Complete Accessory Kit product page:
20-137
Deep link to instruction manual:
20-137 Manual

Re: Hooker 73-87 GM truck LS swap system
 

Thank you! I looked everywhere...except in the instructions. :)

Re: Hooker 73-87 GM truck LS swap system
 

Thank you jetfast for saving me some time this afternoon!

Re: Hooker 73-87 GM truck LS swap system
 

No problem!

Re: Hooker 73-87 GM truck LS swap system
 

Todd,
I placed a order through summit racing for the hooker exhaust system 11-17-15. Just got a email with expected ship date of 1-27-16. Does it really take 3 months to build a exhaust system?

Re: Hooker 73-87 GM truck LS swap system
 

I ordered my thru summit as well first of Dec . Summit did say its to ship in Jan when I ordered . I too just got a email from summit that they have not heard from the manufacturer on a ship date yet . So not sure when it will arrive . I would like to know if is going to be another month or so .

I would expect the holidays slowed things down . Also must of not had any stock at all on hand .

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 .

It depends on the actual kit you ordered...what tip exit style did you order, and did you order a 409SS or 304SS system. I bought a 304SS for my own Squarebody and had to wait a while as well to get it. I can tell you that either one is worth the wait as you won't find anything else available with the same or better fitment or hardware quality.
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The manifold on the project truck was the Hi-ram, you shouldn't have any problems fitting it with your mounts either.
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Yes, the holidays bring everything to a crawl for the most part...I'll see if I can find out something on the status Monday morning.
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Re: Hooker 73-87 GM truck LS swap system
 

Thanks for the response.
I ordered the 304ss exiting behind the rear tire. No biggie, Im sure it will be worth the wait. I just assumed that you guys had several of these built up and ready to ship out.
I guess I'm just anxious to get it installed haha.

I'm hoping that this setup with the x-pipe will eliminate the flutter sound that I am getting when i get on it. It's been driving me crazy, I've tried different mufflers as well, they mostly just changed how loud it was.

Re: Hooker 73-87 GM truck LS swap system
 

I adapted the 2.5" version of that same system onto my 79' C20 and it sounds awesome at all road speeds and throttle angles. I'll see if I can find out anything about the status of things on Monday.

Re: Hooker 73-87 GM truck LS swap system
 

Toddoky , Just wanted to give a update on the hi ram intake . I have got my engine apart and decided to try to check clearence for the intake . I see the the intake is 12.3" tall at the highest point from the valley on the front . I stacked 2x4 on top of the valley cover to get 12" at the front . The hood would not close . Apparently the flat plates and stock stands and mounts must hold the engine up . I took one 2x4 off which made 11" tall and the hood would close with 1/4 to 3/8 clearance best I could tell . Just wanted to let you know for future reference .

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 .

Re: Hooker 73-87 GM truck LS swap system
 

That's unfortunate that the Hi-Ram wouldn't work for you; all the non-Hooker fitment info I give out is relative to using the Hooker mounting components as a reference point and making my best guess from there.

Re: Hooker 73-87 GM truck LS swap system
 

Yea , I understand that point .

I re looked at the schematic dimensions and noticed it said at the bottom , engine block lifter valley flange . Was this measurement taken from the block or was it from the top of the valley cover . This may be a make or break deal . If it was from the block I will re measure . Just trying to make it work .

Re: Hooker 73-87 GM truck LS swap system
 

The engine block surface.

Re: Hooker 73-87 GM truck LS swap system
 

I'm not sure what the chances are but does P/N 12646HKR fit 67-72 frames?

I love the clearance this thing offers for true duals on a dropped truck.

Re: Hooker 73-87 GM truck LS swap system
 

I wish I knew myself if it fit the early trucks or not, but installation in those applications has never been attempted.

Re: Hooker 73-87 GM truck LS swap system
 

Is there a spec sheet with measurements? I've got a 68 and a tape measure. :metal:

Re: Hooker 73-87 GM truck LS swap system
 

I can't post the actual engineering drawings, but I can put something together for you in the morning that shows the critical dimensions.

Re: Hooker 73-87 GM truck LS swap system
 

I got word today from someone in charge that your exhaust system will be shipping out shortly.

Re: Hooker 73-87 GM truck LS swap system
 

Cool man, I appreciate you looking in to it. I can't wait to get it.
I got to drool over that red truck and the silver one at ls fest this year, I was hoping someone was around to start it up for me so I could hear the exhaust note, but no luck. Hopefully I'll be doing my own song and dance soon.
Thanks again!

Re: Hooker 73-87 GM truck LS swap system
 

Trust me, you're really going to appreciate the finished results of your install. Both of those trucks are really nice and great examples of what you can achieve using the entire Hooker swap system...you can bolt it all in over a weekend.

Re: Hooker 73-87 GM truck LS swap system
 

Toddoky-I am searching for headers that will fit my truck, it looks like these headers don't go below the frame rail. Is that the case? I want longtubes but don't want them going below the frame rail.

Re: Hooker 73-87 GM truck LS swap system
 

That's correct, neither the Hooker headers or exhaust systems drop below the frame rails when you mount the engine and trans with the Hooker engine brackets and transmission crossmember. Please note that the headers have unique bend geometry and will not install with typical flat swap plates that are use with the old-school type Chevy engine mounts.

Re: Hooker 73-87 GM truck LS swap system
 

Ok, I have the dirty dingo mounts that look very similar to the hooker mounts. I might give them a shot.