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Description
1973-1987 GM K Series Cummins Conversion Kit GF-GMK3-KITOur 73 87 GM Truck K Series Cummins Kit is comprised of many of the items needed for your Cummins diesel engine conversion. It includes a transmission adapter and flexplate to mate a TH400, 700R4, or 4L80E transmission to a 6BT Cummins engine.? Our Cummins bolt in 2" drop engine crossmember (or K Member) allows for proper engine placement and provides chassis strength to accommodate the added torque of the Cummins! Fits Truck Model Years: 73 87. Fits
Our 73-87 GM Truck K Series Cummins Kit is comprised of many of the items needed for your Cummins diesel engine conversion. It includes a transmission adapter and flexplate to mate a TH400, 700R4, or 4L80E transmission to a 6BT Cummins engine.? Our Cummins bolt-in 2" drop engine crossmember (or K Member) allows for proper engine placement and provides chassis strength to accommodate the added torque of the Cummins!
- Fits Truck Model Years: 73-87.
- Fits Engine Years: 89-02.
- Fits Transmissions: Chevrolet TH400, 700R4, 4L80E.
- This kit is comprised of some of our most popular items for your 73-87 Chevy K Series Cummins conversion.
- The Kit includes:
- GF-C-S - Adapter and Flexplate-? The 5.9 Cummins to Chevy Adapter Plate and Flexplate Kit accommodates 2002 and earlier Cummins 6BT engines bolting to a Chevy automatic transmission such as a TH400, 700R4, 4L80E, or similar transmission.
- >GF-GMDC - Cummins 6BT to Chevy Drop Crossmember-? This 2" drop crossmember allows proper engine placement and often eliminates the need for a lift kit when installing a Cummins 6BT into a 73-87 Chevy 4WD truck.
- GF-C-MM - Motor Mount- When installing a Cummins 6BT into your 1973-1987 Chevy pickup, this conversion motor mount allows for proper placement of the engine directly to the OEM frame mount isolators. When used in conjunction with a G Force GF-GMDC Drop Crossmember on 4WD models, you can retain OEM drivetrain height. Without our GF-GMDC Drop Crossmember a vehicle body lift is required.
- GF-BoltKitAdapter - Adapter Bolt Kit,? Premium grade bellhousing adapter bolt kits to make mounting the adapter plate to engine as simple as possible. Set of 9 bolts.
- GF-BoltKitFP?- Flexplate Bolt Kit, -Flexplate bolts for mounting your Cummins 6BT to a GM Bellhousing. 12mm x 1.25. 25mm underhead length. Set of 8 bolts
- GF-BoltKitStarter - Starter Bolt Kit - Steel, zinc plated bolts constructed to strict engineering quality standards and serve as direct replacement bolts for replacing the Cummins 6BT starter. Set of 4 bolts with 3 washers
Note: This kit ships in two boxes.
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1975-1986 | Chevrolet | K10 Suburban | |
| 1975-1976 | GMC | K15 | |
| 1975-1986 | Chevrolet | K20 | |
| 1973-1974 | Chevrolet | K20 Pickup | |
| 1975-1986 | Chevrolet | K20 Suburban | |
| 1975-1978 | GMC | K25 | |
| 1973-1974 | GMC | K25/K2500 Pickup | |
| 1979-1984 | GMC | K2500 | |
| 1977-1986 | Chevrolet | K30 | |
| 1973-1974 | Chevrolet | K30 Pickup | |
| 1977-1978 | GMC | K35 | |
| 1979-1984 | GMC | K3500 | |
| 1987 | Chevrolet | V10 | |
| 1987-1988 | Chevrolet | V10 Suburban | |
| 1989-1991 | Chevrolet | V1500 Suburban | |
| 1987 | Chevrolet | V20 | |
| 1987-1988 | Chevrolet | V20 Suburban | |
| 1989-1991 | Chevrolet | V2500 Suburban | |
| 1987 | Chevrolet | V30 |
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Exchange/Return Notes
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4.4 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 4
Good!!!
Size: Medium, Color: Avocado
Excellent quality and durability.My pets really enjoy it and it's almost impossible to damage it!!
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Recommended by my chihuahua puppy!
Size: Small, Color: Waffle, Size: Small, Color: Waffle
This has been a fantastic toy for my chihuahua puppy. She actually carries it around by the tag and loves rolling it over with her nose. It's a little big for her, but she still really enjoys it.
The tough edges are perfect for her little tiny shark teeth. I think she'll like this one even more as she begins teething.
It's obviously an adorable toy and it has held up really well so far. It does have a loud squeaker if that's something your dog likes or dislikes. Mine doesn't have the jaw strength or size to squeak it, but she likes it when I do it.
Considering what I paid and the many low quality toys on the market, this thing is a great value. Highly recommend it for toy and small breed dogs and puppies!
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Reviewed in the United States on June 9, 2026
★★★★★ 5
Tough Versatile Interactive & Chew Toy
Size: Medium, Color: Strawberry
Update: the Snake is the absolute best in terms of entertainment value. Provides tugging opportunities and our dog is obsessed with it. Love these toys.
This is quite literally one of the only toys we can leave with our puppy as both an interactive and self-play chew toy. Our small puppy (<20lbs) destroys every plush and latex toy in minutes. Has no interest in playing alone with durable toys like Kong and gets bored of them if we don’t play with them interactively. This satisfies our dog’s needs to chew on toys and keeps her entertained when we want a break but also quickly becomes a beloved interactive toy we can play fetch with. Yes, eventually our doggo destroys it as expected since we are using to both as a chew and interactive toy but it takes quite a while and we are very satisfied and impressed. This one stands the test of time.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Good for Enthusiastic Chewers
Size: Medium, Color: Strawberry
I wasn't sure how long this toy would last with my beagle, but it has held up surprisingly well! My dog is rough on toys and usually destroys them pretty quickly, yet this one has survived lots of chewing, carrying around, and playtime.
Definitely a great purchase for active dogs and enthusiastic chewers.
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Reviewed in the United States on June 7, 2026
★★★★★ 4
Tough Little Dog Toy
Size: Small, Color: Waffle
Interesting little toy. It’s pretty flat, which surprised me for some reason, but very thick and tough, and big enough for our small, aggressive chewer. Feels really substantial, Hoping we’ve found a toy that lasts.
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Reviewed in the United States on May 26, 2026