loco
Junior Member
- Joined
- Mar 15, 2024
- Posts
- 3
- Reaction score
- 0
- Location
- Placerville, CA
- First Name
- Miguel
- Truck Year
- 1985
- Truck Model
- C20
- Engine Size
- 6.2
Nice work!!!
Square body on new chassis?
- Thread starter 436'd skylark
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
offroadunleashed
Junior Member
- Joined
- Aug 21, 2024
- Posts
- 2
- Reaction score
- 0
- Location
- Saskatchewan, Canada
- First Name
- Adam
- Truck Year
- 1986
- Truck Model
- K10
- Engine Size
- 454
I want to do a similar swap but a 3+3. What did you do for a steering shaft? Did you keep the squarebody hydroboost?
77Dmax
Full Access Member
- Joined
- Nov 10, 2024
- Posts
- 298
- Reaction score
- 670
- Location
- vt
- First Name
- Joe
- Truck Year
- 1977
- Truck Model
- c20
- Engine Size
- 6.6
The hydroboost is from the 05. I drilled new holes to mount it. The 77 had a normal booster. That was no big deal at all.
The steering shaft was a little more involved. I bought a universal joint from the local speed shop and had to weld the 77 upper shaft to the joint. The 77 double D shaft fit inside the 05 lower shaft- also a double D shape. Got it square and welded that. The collapsing part of the 05 shaft is still there, so maybe it is still kinda safe?
The steering shaft was a little more involved. I bought a universal joint from the local speed shop and had to weld the 77 upper shaft to the joint. The 77 double D shaft fit inside the 05 lower shaft- also a double D shape. Got it square and welded that. The collapsing part of the 05 shaft is still there, so maybe it is still kinda safe?
offroadunleashed
Junior Member
- Joined
- Aug 21, 2024
- Posts
- 2
- Reaction score
- 0
- Location
- Saskatchewan, Canada
- First Name
- Adam
- Truck Year
- 1986
- Truck Model
- K10
- Engine Size
- 454
What about the intercooler piping?
77Dmax
Full Access Member
- Joined
- Nov 10, 2024
- Posts
- 298
- Reaction score
- 670
- Location
- vt
- First Name
- Joe
- Truck Year
- 1977
- Truck Model
- c20
- Engine Size
- 6.6
I didn't change them at all. The 05 core support is mostly in place. The rad, intercooler, shroud etc all are mounted as they left the factory, even the stock body mounts. I merged the two supports together. The first post or two describes the process. It was a pain in the ass, i spent hours trimming the two supports to fit together. If this was an LS truck i would have tossed the 05 support all together, but the duramax support is pretty busy with all the coolers and ecm mount. Plus I kinda remember the 05 radiator was way too big for the stock 77 support. It would have required a custom radiator that I didn't want to spend the money on..
77Dmax
Full Access Member
- Joined
- Nov 10, 2024
- Posts
- 298
- Reaction score
- 670
- Location
- vt
- First Name
- Joe
- Truck Year
- 1977
- Truck Model
- c20
- Engine Size
- 6.6
The cab has it's stock harness in place, everything works as it did in 77. The ac controls needed a vacuum pump to run actuators. Thats plumbed into the stock canister.
The cruise I have not been able to get working. I have it wired up and kinda gave up on it 4-5 years ago. It since occured to me that i never gave the ecm brake pedal input, so I'm questioning if thats my issue. I may look into that again this spring. Right now I'm busy plowing the driveway with it.
The cruise I have not been able to get working. I have it wired up and kinda gave up on it 4-5 years ago. It since occured to me that i never gave the ecm brake pedal input, so I'm questioning if thats my issue. I may look into that again this spring. Right now I'm busy plowing the driveway with it.
Similar threads
