Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

That's some good comparative information that I'm sure others will find useful.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

While I'm checking in to this thread I thought I post some pics of the 1970 C10 development truck in its current state of assembly.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

72MARIO; thanks for the update, I appreciate it.

Toddoky; that’s a good looking stepper, thanks for sharing. What size wheel/tire combo is it running?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I'm not sure about the wheel/tire package sizes used as I had no involvement with the assembly of the truck. I will have to provide the info at a later time as the truck has left the engineering lab temporarily, so I don't have access to it to be able to gather that information off of it.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

The truck found its way back to the lab...the wheels are 18" x 8" on front and back and the tires are 225/60R on the front and 250/60R on the rears.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Just a FYI the exhaust system will not work with suburbans. I should have looked closer at my truck. I know it was not specified to fit suburbans. I bought it hoping it would work out
The pick up box floor is raised 3" above the frame behind the trailing arm crossmember. The suburban floor stays flat and the mufflers hit the floor. Between the missing hanger from the exhaust kit and hours on the phone trying to get the missing hanger I am going to have a ton of hours into this system.

What solution did your team come up with for the parking brake cable ?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Hello 72Mario. Yeah, the exhaust systems were developed to specifically fit the short bed coil spring equipped pick-ups only, which is why the long-bed trucks and Suburbans are not included in the application listing for them. The parking brake cables will need to be reconfigured with aftermarket parts made for such purposes, or with parts custom made by the user. I came across a couple of different aftermarket cable systems during my support research for the exhaust systems, but I don’t remember the brand names of those components off the top of my head. A google search should net someone similar results to what I came across.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Any update on the engine stands for a 67 with wide upper frame rails?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

They have evidently made it onto our shelves and are awaiting a press release to be sent out to be listed on the Holley website. I would guess they will become visible by the end of the week.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Sounds great, thank you!

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Wow the side exit blackheart system has increased over $200 in price during the couple of months that I've been waiting on the release of early frame stands.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

http://67-72chevytrucks.com/vboard/member.php?u=157703, we're considering the 3" Blackheart Exhaust system for a 68 SWB we're building, however there are very few good pictures of the rear exit version of this system. Even the installation instructions on your website show only side exits in the pictures. We would like to see some more pics, specific to the 3" rear exit as we are using an aftermarket panhard bar and coilover conversion that will require modifying your tailpipe locations and we'd really appreciate a good look to help us determine how much modding it may take. Cheers

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Make sure you are comparing the price based on the same type of material. The exhaust systems are available both in 409SS and 304SS and there certainly is a cost/price difference between those material choices.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I'll post a couple of images of the prototype tips of the rear exit system as I don't have any installed shots of production parts at this time. The over-axle tube assemblies are the same for the side exit and rear exit systems.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I know this is an old post but I'm curious if this is still the case - the installation instructions do still say that a high hump is needed for a 4l80... Am I right in thinking that it probably does fit, but with tolerances too tight to officially guarantee for a user installed part?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

My 4l80 fit in a low hump. I just didn't get there planned engine angle. I think if I remember right my engine sits at 4.5 relative to the frame. So I just matched my pinion angle and got a shaft slope of 3 degrees and equal operating angles of 1.5.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Thank you!

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

No I'm comparing the same 409SS material. A few weeks back the rear exit and side exit systems were priced the same. The side exit system has increased significantly in price while the rear exit has remained the same. I really like the system (side exit preferbly) and felt it was fairly priced, perhaps I'll go for the rear exit before a price increase.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

For those who have been waiting for the Hooker Blackheart engine mounting brackets for the 1963-67 wide frame rails, they have been released and posted on the Holley website along with the new Hooker Blackheart trailing arm crossmember for lowered trucks.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I purchased this kit (2.5") and wanted to give my thoughts for those thinking about it. My set up is a little different than all of the Holley parts recommended as they were not available when I was installing everything. I have a 6.0 sitting on POL stands. 4L80e trans with Dirty Dingo cross member. Speed Engineering Long Tube headers. I had already cut the holes in my trail arm cross member and they are not exactly where Holley have theirs as mine sit closer to the frame rails, but are 4" holes.

The kit fits amazingly well from the rear bumper to the h-pipe. The quality of the kit and the brackets are top notch. I highly recommend the kit over having a shop build you a stainless system.

The downside, if you want to call it that, is hooking up the H-pipe section to the headers. The headers sit lower than what the pipe is. I ended up having a local shop fabricate up some pipe to make the connection. I wasn't too bad to have done, but I could not find a local shop that could do mandrel bends, so I had to go with the old press bends. At some point I will put cut-outs in and have mandrel bends installed.

If anyone wants pics of my install let me know.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Feel free to post up all the pics you want of your exhaust system here in this thread as your photos may be as valuable as your written feedback to some other C10 owners.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I'll post up some pics after it is all tightened down and adjusted. I did discover today that my kit is missing the 2.25" band clamp for the H-pipe. That will be a pain to take it all apart again for that clamp. I have a strap clamp I will use until Holley sends me the replacement.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Those of you needing LS or LT engine mounting brackets for a 1967 model year truck with wide frame rails can now find them on the Holley website as part number BHS538. Here is an image of these mounting brackets installed on our 1964 C10 development truck (they work on all 1963-66 trucks and 1967 trucks with wide frame rails.). The brackets shown are pre-production samples, production parts are black powder coated.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Do you offer a rubber engine mount ? I bought the holley poly and think there transfering some unwanted engine harmonic vibiration thru the suburban.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

At this point we don’t offer rubber inserts, but if you want to run rubber mounts, you can use stock replacement motor mounts for a 1998-2002 LS1 equipped Camaro with the Hooker Blackheart mounting brackets. I would advise however that you use the mounts that GM sources and offers as many of the aftermarket versions we’ve come across are poor quality and will fail quickly when used on any engine with a power output that is greater than what a stock LM7 5.3L truck engine puts out.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

The only header back exhaust I was able to locate on the Holley site for the 67-72 C10 was the Flow master American Thunder, do you have a part number for the Hooker set-up, the 300 SS series but if the 400 SS is all you have that will be fine. Update- I Googled the Hooker Blackheart 67-72 C10 and it took me to the page on the Holley site

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Has there been any header/manifold fitment done for the 63-72 wide frames using the BHS538 mounts?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Yes, there is a set of headers that were prototyped specifically for use on that application (they haven't been released yet) and the Hooker cast iron exhaust manifolds fit as well as shown in these attached images. As far as stock exhaust manifolds are concerned, I can't say as it wasn't one of my projects.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I am looking for info on the Holley trans crossmembers for 71 c10. I was looking into the new TREMEC TKX transmission. They are based on the TKO. I don’t see the TKO mentioned in any of the c10 trans crossmembers. Another company says theirs will work that modeled for 700r4. Any advice for the Holley system?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

We have not yet gotten a TKX transmission in here to be able to validate its fitment geometry, but if published reports of its mounting geometry being the same as the TKO are true, I can give you some guidance on what to expect.

The mount bolt holes/mating plane location on the TKO transmission is 1/4" further rearward than it is on a 700R4 and is 5/8" closer to the output shaft center line.

In theory, that means you could use a 700R4 crossmember with a 5/8" spacer under whatever mount the crossmember was designed to use to mount a 700R4 transmission. In practice however, this working out heavily depends on the design geometry of the crossmember in question as the mount pad on the TKO is located right up against the belly of the rear case and so may cause interference with some crossmembers, even though they fit fine with a 700R4.

The only way you are going to be certain is to roll the dice and try it, which is what I'll eventually have to do here with the crossmembers in the Hooker Blackheart swap systems. If the geometry of the current designs do not offer optimized installation geometry, then I will have to develop new specific crossmembers that will.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I ordered some swap headers, BH13173, but was told today they have been discontinued and no alternative is available. Checked Holley's website and I don't see any long tube headers listed for LS swaps into 67-72 trucks. Already ordered the crossmember and exhaust system to ensure it all fit, but now no headers. Anyone know why?

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

That part number has been obsoleted to make way for a new designed header for the same application, which should be close to be getting through its first production run in the coming month.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Good to know, thanks.

Will the existing exhaust system and crossmember designed to work with the old, work with the new design?

Does the new design offer clearance for wide frames, where old design apparently did not?

Can you pass along the new part number, as I'll order it when it's available.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Yes, the new headers will work with the other existing parts for this application. The new headers will fit 1968-87 C10 trucks and were designed for compatibility with our favored engine mounting set-up the uses 4th-Gen F-body type motor mounts. The 1963-67 wide frame trucks will be covered by their own specific header design/part number. I’m not permitted to post part numbers or photos of products until they are released, but I will do so in this thread as soon as I see that happen.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Did any managed to install the 3" or 2.5" exhaust system? would love to hear it running before getting one. I plan on doing the whole system engine stands, trans cross member, and trailing arm cross memeber.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

A page or two back someone has pictures installed. I "believe" they have it running.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I've got a 5.3 build that was finished before these Holley parts were out. It has the GM muscle car pan on it. Will that work with the Holley LS swap parts or will I need to swap to a 302-2 pan?

(I've got the full Holley LS swap system going in my 69 Camaro and it's great stuff, thanks for the all the work that has gone in to these great systems)

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Hello rin68. Although I never attempted to installing an LS using the Hooker Blackheart swap components and that specific pan, my guess is you will experience interference between the front end of the pan and the steering center link if you try to do so. The Holley 302-2 and 302-3 pans are 1.25" tall at their front profile and the LH8/hot rod pan is 2.5" tall. There is about a 1" clearance gap between the 302-3 pan and the center link on our 64 project truck that I just took a look at and the 67-72 truck has a little more clearance, but not much.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

I installed the Holley Black hearts mounts with a stock C10 trans crossmember and Speed Engineering headers. All fit well, driver side 1/8” grind on the bracket but didn’t need to. Stock truck pans fits fine just a little rub on the steering shaft and below crossmember, if you’re not lowering the truck you’ll be ok. I can shim the brackets up 1/8” to 3/16 and it’ll be fine. But I’ll probably switch to CTSV oil pan because I have it. The bolts that came with the brackets don’t even cover the brackets well. Heard someone here they now provide some diffrent mount bolts.

Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
 

Lol, little rub on the pil pan to a steeing component that moves constabtly and an engine that shakes fits fine must be a joke.. not to mention when the engine mounts wear out... smh