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  1. 77 K20

    Driveshaft options for 1991 r3500 4wd conversion

    It all depends on where you live. For me there is basically just one shop in town for drivelines. Been here forever. I've heard the guy was a jerk. I drove to the shop and asked him about driveline modifications I needed and he just laughed. "For something like that just go to a junkyard. I'm...
  2. 77 K20

    Is the 8.1 still a dead end swap?

    It was believed to be a bit over 750 lbs for the 8.1
  3. 77 K20

    Is the 8.1 still a dead end swap?

    I had a 2003 Silverado 2500HD. Extended cab, long bed, 4x4 with the 8.1L. I kept hearing how bad gas mileage was- but it was from the Allison transmission equipped guys. Mine had the ZF-6 manual transmission. It made them a lot more efficient, and better power to the wheels. I use Fuelly and...
  4. 77 K20

    FOUND IT! '86 K5, 2 1/2" Jacked Front, Rear Stock Height ... etc.....

    Do you have a drop pitman arm? If the road is perfectly smooth is driving ok? And only once there are some dips and bumps then it starts to pull/wander? Might just have bumpsteer.
  5. 77 K20

    Shocks! How much down travel needed?

    ORD does have a Bilstein shock spec for xxxx lift size chart: ORD chart (click me) They say for a 4" lift (using the Bilstein 5125 shocks) front shock should be 9.25" and the rear 11" (this is shock travel). Then you click on the product info tab they give you the rest of the shock specs...
  6. 77 K20

    Suburban fender trim help

    I trimmed my fenders (which wasn't hard due to all the rust). And you're right. The fender flaps around there as it is unsupported. You might look into getting an axle relocation plate or a zero rate block and move the axle forward instead. It is easier to trim the front of a fender- remove the...
  7. 77 K20

    Np203 part time conversion?

    I have had both a converted 203 and a full time 203. I didn't see that much difference in fuel mileage. According to my mechanic maybe you'd see 1 to possibly 2 mpg difference. It would take a while to recover cost of the parts and install for a part time conversion. I had a '77 K5 Blazer. It...
  8. 77 K20

    Be safe when trying to pull out a stuck vehicle-

    I guess I should add that the kinetic ropes work excellent in what I've been doing- and that is typically playing in snow. Snow doesn't get all the nasty suction that mud can have. And a shovelful of snow will weigh less than a shovelful of mud. I learned 25 years ago or so that mud just...
  9. 77 K20

    Be safe when trying to pull out a stuck vehicle-

    @Bextreme04 I thought the military went to using kinetic energy ropes for recoveries. They introduce a lot less shock on everything. I've even seen 2.5" ropes that are just too big for "normal" people to use. (200,000+ lbs rating)
  10. 77 K20

    Be safe when trying to pull out a stuck vehicle-

    My local off road club had a link to this article. I'm not a facebook person but can still access and read it: hitch breaks off and kills stuck driver <-- link Mistakes were made and someone was sadly killed for it. It's easy to say after the fact to "always have the proper equipment" but...
  11. 77 K20

    Equal - Tire Balancing Beads, No weights to Lose

    My truck has been sitting a lot the last few months. I did drive it last week to get some lumber in it. There was a bit of a shake on the highway. Nothing too bad- but not the typical smoothness. A few miles down the road was the lumber yard. I only bought a few boards (hardly any weight) and...
  12. 77 K20

    Heavy Duty Bumpers / Headache Rack

    I see you are from Montana- welcome! https://www.movebumpers.com/community/gallery/chevy/Chevy-1500/1973-1987 https://diy4x.com/home.php?cat=251 Might check out local welding shops to see what they can build.
  13. 77 K20

    swapping gear ratio in the 14 bolt??

  14. 77 K20

    swapping gear ratio in the 14 bolt??

    If I remember right you can't just put higher gears in your 14 bolt without changing out the carrier. The break was between 4.10 and 4.56
  15. 77 K20

    Normal operation of 4wd

    Does it look like this? Especially I mean with the "window" to the left of the shift lever with the indicator of what mode you are in. I'd think that is what you would have for your year. Should be easy to shift. In both my '86 GMC Jimmy and my dad's '87 K5 Blazer shifting it was super easy...
  16. 77 K20

    Planning ahead for 3/4T 4WD Suburban suspension

    I don't know how accurate this is- but I've went by this chart for lack of any better information.
  17. 77 K20

    Planning ahead for 3/4T 4WD Suburban suspension

    Yeah- 3/4 ton (K20). My older posts in my build thread lost the pictures somehow, but I covered pretty much everything I did to it. On the second page I did try reposting what pictures were lost. I've went from 235/85R16s to 265/75R16s, to 285/75R16s, to 315/75R16s and now 37x13.50R17s. The...
  18. 77 K20

    Planning ahead for 3/4T 4WD Suburban suspension

    I've heard the difference between the Tuff Country EZ ride springs and the HD springs is they put an extra leaf on the bottom of the HD pack. If it rides too stiff you can remove that bottom leaf. I don't know what the difference in cost between the springs is. I was running 285/75R16s with...
  19. 77 K20

    Planning ahead for 3/4T 4WD Suburban suspension

    One of the build versions of my truck was some 2" Tuff Country HD front springs, removed the sway bar, Bilstein 5100 shocks, 3" block for the rear springs. I was still towing and hauling firewood so wanted load capacity. It still rode better than it did stock. The HD front springs actually...
  20. 77 K20

    Why is it so hard to find a rear shock mounting bolt 1980 Chevy K20 - Help Please

    Sometimes. Depending on the brand often that shock part number also works on other vehicles. Lets say maybe a Dodge truck. They don't use the same mounting hardware so the shock can ship without any hardware at all. With all the rust and de-icer around here I have been buying stainless bolts...
  21. 77 K20

    Why is it so hard to find a rear shock mounting bolt 1980 Chevy K20 - Help Please

    https://www.offroaddesign.com/73-87-91-rear-shock-stud-sold-as-a-pair.html
  22. 77 K20

    8.1 vortec into 1979 k30

    I was going to say this. I read something like 33 pages of stuff on his blue truck and I thought he was doing it again on a Suburban. I read it on expedition portal though.
  23. 77 K20

    Smooth ride

    For the best ride possible there is custom coil overs from offroad design. Or custom leaf springs from offroad design, or even custom leaf springs from Deaver Spring. Then get some good shocks. offroad design website
  24. 77 K20

    Extended brake lines….

    ^^^ what they said. link
  25. 77 K20

    New here thanks for having me 86bluek10 with k20 axle 6 inch BDS lift 37in tires on 20 rims but changing to a 16 in rim soon

    Do you feel the shake more in the seat (rear axle) or thru the steering wheel (front axle). Ball joints good? Steering box tight on the frame and frame not cracked? You might look at a 17" wheel instead of a 16" to change the subject to you looking at new wheels. Lots more selection in a 17 vs...

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