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Description
1970-1974 2nd-gen F-body LS Swap Transmission Crossmember 12616HKR-1Revised Design specifically for T56 (GM 4th gen F body GTO versions only), T56 Magnum, 4L80E 4L85E, TH400 and 200R4 transmission installations. The revised design is easier to install since the feet are removable and can be installed separately. Features: Provides for direct installation of a T56 (GM F Body GTO LS versions only) or T56 Magnum transmission Provides for installation of a 4L80E, 4L85E, TH400 or 2004R transmission with the combined use of
Revised Design specifically for T56 (GM 4th-gen F-body/GTO versions only), T56 Magnum, 4L80E/4L85E, TH400 and 200R4 transmission installations. The revised design is easier to install since the feet are removable and can be installed separately.
Features:
- Provides for direct installation of a T56 (GM F-Body/GTO LS versions only) or T56 Magnum transmission
- Provides for installation of a 4L80E, 4L85E, TH400 or 2004R transmission with the combined use of a Hooker Blackheart 71223013HKR adapter or 12650HKR spacer block
- Designed specifically for use with Hooker Blackheart 12512HKR and 12613HKR engine mounting brackets
- CAD modeled design optimizes fitment and strength while minimizing weight
- Built with powder coated steel construction for attractive, long-lasting durability
- Designed to provide optimized U-joint working angles and exhaust system ground clearance
- Bolt-in compatible with all Hooker Blackheart headers, exhaust manifolds and exhaust systems available for this vehicle application
- Designed for use with 71223029HKR (black) or 71223030HKR (red) transmission mount
- Revised Design for easier installation with removable feet
Specs:
| Application | 1970-1981 GM F-Body |
|---|---|
| Brand | Hooker BlackHeart |
| Color | Black |
| Emission Code | 6 |
| Engine | GM Gen III/IV (LS) |
| Exhaust Series | Hooker BlackHeart |
| Finish | Black Powdercoated |
| Material | Steel |
| Motor Type | GM LS |
| Product Type | Transmission Crossmember |
| Subframe | Stock |
| Transmission | 200R4 |
| Transmission | 4L80E |
| Transmission | 4L85E |
| Transmission | T56 GM |
| Transmission | T56 Magnum GM |
| Transmission | TH400 |
| Transmission Type | T56 (GM F-Body/GTO LS versions only) or T56 Magnum |
| Type of Component | Crossmember |
Applications:
- Fits:
- 1970-1971 Chevrolet Camaro
- 1970-1974 Pontiac Firebird
- Engine: LS Swap
Fitment Notes:
- This crossmember is designed as an Integral component of the complete Hooker Blackheart LS swap system for this vehicle application. Its unique design geometry is designed for compatibility with Hooker Blackheart 12512HKR and 12613HKR engine mounting brackets only.
- Due to design variances in the crossmember mounting hole locations on GM 2nd-gen F-body subframes, the mounting holes in this crossmember may not line-up directly with the mounting holes in your subframe. In such cases, the crossmember will need to be mounted using angle brackets included with this crossmember (requires drilling new holes in the subframe).
- Direct installation of a T56 (GM F-Body/GTO LS versions only) or T56 Magnum transmission.
- 4L80E or 4L85E Transmissions REQUIRE Part Number 71223013HKR
- TH400 or 2004R Transmissions REQUIRE Part Number 12650HKR
- Note: this crossmember is not compatible with Tremec TR6060 transmissions
- Designed for use with 71223029HKR (black) or 71223030HKR (red) transmission mount
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.4 ★★★★★
Based on 2245 reviews
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Product Reviews
★★★★★ 5
Great
Format: Paperback
Good information for any users
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
★★★★★ 5
Great confidence booster for dad - techniques can be successfully implemented immediately after birth!
Format: Paperback
This is an excellent book! My husband read this book before our baby was born. Although I found a synopsis to be enough for me (no need to read a whole book for five main techniques), as an engineer, he really liked understanding all of the "whys" behind the methods, and understanding the reasoning gave him more empathy for our baby. My husband started implementing the techniques in this book immediately in the hospital right after the birth, and they really worked! It was extremely helpful for his confidence as a dad and for my confidence in him / us as we started the adventure of parenting (especially when I was recovering from childbirth in those early weeks). We have continued using these techniques for months, and they make a huge difference. Sometimes babies get overly tired and don't even know why they are crying anymore, and these techniques help to soothe quickly to get down for a nap. Truly, I do not know where we would be without a good swaddle and turning our baby on his side while swaddled, because he can be losing it completely and then the swaddle / gentle bounce calms him down very quickly. The one thing I wish the book did mention but does not is that it IS possible for a swaddle to be too tight on the legs - the latest research shows that babies need room to bend and straighten their legs for safe growth of their hips, so it's ok to do a fairly tight swaddle such that their arms cannot escape, but there does need to be slack at the feet.
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Reviewed in the United States on December 31, 2015
★★★★★ 5
SAVED MY SANITY!!!
Format: Paperback
I don't know why I didn't leave a review on this book as soon as I finished reading it! My daughter was quiet for the first week home from the hospital, but along came week two and around 8 pm one night she began to cry, and this time it was different, we literally could not get her to stop. She cried until around 4 am, and I was terrified that we had a year of colic crying ahead of us, but prayed it was just a fluke and that the next night things would be different. However, 8 pm rolled around, the crying began, and we had a repeat of a night full of inconsolable crying. I had never felt such all encompassing exhaustion in my entire life and I just prayed that there was a book that would have answers for me. So the next morning I took to Amazon and began my search. After reading reviews I decided to give this book a try - the length was perfect, thank you Harvey for getting straight to the point and telling us exactly what we needed to know! I was able to implement the S's the following evening at 8 pm when the crying began and I believed with every fiber of my being that it was going to work - AND IT DID!!! Simulating the womb experience was exactly what my daughter needed to soothe her overstimulated little newborn nervous system and she calmed down in less than a minute and fell into a blissful sleep that lasted until her next feeding, after which we repeated the process and she was asleep again. She was sleeping through the night after a couple of months, and we continued to use Harvey's method until eventually she didn't seem to need it anymore. This book was a lifesaver, I have given it as a gift at every baby shower I've attended since I first discovered it, and I'll continue to give it as long as I live!! This book could just as easily be called Happiest Parents on the Block - I am so very grateful that I found it when I did!
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Reviewed in the United States on May 22, 2020
★★★★★ 5
Every new parent and grandparent should read this book.
Format: Paperback
Exceptionally practical book for every new parent and grandparent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 4
Ignore the sales pitch and absorb the advice
Format: Paperback
I agree with other reviews, great advice but the dr really pushes his products in it. I guess the guys gotta make some money. Worth the read though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025