05-24-2020, 10:36 PM | #126 |
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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 ?
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD Last edited by 72MARIO; 05-24-2020 at 10:52 PM. |
05-25-2020, 12:43 PM | #127 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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08-10-2020, 08:57 AM | #128 |
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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?
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08-10-2020, 10:25 AM | #129 |
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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.
Last edited by toddoky; 08-10-2020 at 03:23 PM. |
08-12-2020, 10:42 AM | #130 |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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08-12-2020, 01:10 PM | #131 |
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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.
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08-13-2020, 01:09 AM | #132 |
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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
Last edited by Pythonater; 08-13-2020 at 09:32 AM. |
08-13-2020, 09:28 AM | #133 |
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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.
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08-13-2020, 09:34 AM | #134 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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08-16-2020, 06:26 PM | #135 |
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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?
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08-16-2020, 11:18 PM | #136 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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08-17-2020, 01:50 AM | #137 |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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08-17-2020, 02:18 PM | #138 |
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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.
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09-08-2020, 07:19 PM | #139 |
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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.
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09-09-2020, 12:32 PM | #140 |
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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.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
09-09-2020, 02:38 PM | #141 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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09-10-2020, 05:21 PM | #142 |
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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.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
09-11-2020, 11:56 AM | #143 |
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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.
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09-12-2020, 10:12 PM | #144 |
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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.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
09-13-2020, 08:04 AM | #145 |
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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.
Last edited by toddoky; 09-13-2020 at 08:11 AM. |
12-19-2020, 02:32 AM | #146 |
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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
Last edited by greencaravan1; 12-19-2020 at 02:46 AM. Reason: Found problem |
12-20-2020, 10:03 AM | #147 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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Has there been any header/manifold fitment done for the 63-72 wide frames using the BHS538 mounts?
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12-21-2020, 09:55 AM | #148 |
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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.
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12-21-2020, 11:36 PM | #149 |
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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?
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12-22-2020, 09:19 AM | #150 | |
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Re: Hooker Blackheart 1967-72 C10 Truck LS/LT Swap System Info Thread
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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. |
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