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#1 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 211
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Increase 1967 C20 3/4 ton load carrying..
Add load carrying capacity. Extra Springs?
I will add front sway bar. I can carry 200gal water fairly well. Tank is back due to tool box. Like to be able to safely haul 300gal. |
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#2 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,384
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Re: Increase 1967 C20 3/4 ton load carrying..
Adding a rear sway bar would help too, but that's really a job for a 1T truck, since the tank's over a ton when full.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#3 |
Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,467
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Re: Increase 1967 C20 3/4 ton load carrying..
What’s the GVWR in the plate? My 72 c20 is 7500 lbs the truck itself is less than 5k . So over 2500lbs capacity that’s the approx weight of 300 gallons of water . I would go from there .
Lots of limitations on old trucks . Age of the springs and axles is one as is the braking system. Drums would have a lower ability to stop a fully loaded truck . But modern E rated tires are better than old bias plies so that’s a plus . Also 4x4 trucks usually have less payload and GCVWR because they are usually heavier than their 2 wheel drive counterparts.
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. Last edited by 72c20customcamper; 06-30-2024 at 10:28 AM. |
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#4 |
Senior Member
![]() Join Date: Feb 2022
Location: Ca
Posts: 496
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Re: Increase 1967 C20 3/4 ton load carrying..
If you have leaf springs, find a set of Helwig helper springs. I rolled across the dump scales many times over 10k hauling broken concrete about 15 miles. Obviously way overloaded, it was 45 yrs ago and I was invincible. Put many more miles on the truck after that project. 71 c20 custom camper. These trucks are mighty strong but know you are taxing every part of a now 55 year old rig.
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#5 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,073
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Re: Increase 1967 C20 3/4 ton load carrying..
Here is the most economical set of Helper springs that I found on a quick search.
Link: https://www.truckspring.com/products...elper-991.aspx Summit had some better sets that cost More.
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#6 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 211
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Re: Increase 1967 C20 3/4 ton load carrying..
Thanks, great points.
I like the helpers,I ve used hellwigs on my 2006 1500. My drum brakes work good, PO added hydraboost system. 4.57 gear helps up hill. I might stick to 250gal. |
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#7 |
Active Member
![]() Join Date: Jun 2018
Location: Central Coast, CA
Posts: 126
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Re: Increase 1967 C20 3/4 ton load carrying..
I added Timbren "rubber springs" to assist my 2000lb leafs. I think the kit was not designed for leaf suspension, so the mounts didn't work at all and I had to fabricate my own. Kind of a pain in the ass but I'm really happy with the results.
It still rides like a couch and now I can haul a full yard of dirt or rock without the rear getting all sad and squatty like a Carolina truck or whatever.
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1971 Pontiac Firebird 1971 GMC C2500 |
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#8 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 211
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Re: Increase 1967 C20 3/4 ton load carrying..
My CG for water tank being pushed back from tool box, hurts some.
My Chev 2500HD 4dr long bed can haul 425gal tank full. It's a truck. It carried my 3200lb Lance camper "geared up" and towed Chevy wagon |
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#9 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,073
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Re: Increase 1967 C20 3/4 ton load carrying..
Could you change to side mount toolboxes and still have room for water tank and tools you need?
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#10 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 211
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Re: Increase 1967 C20 3/4 ton load carrying..
Probably could move tool box, easier to use big yruck, and settlt for 250gal max.
I heard sway bars are a .yst on front end. . I had a trailer 3500lb single axle,buy that was a mess on wash board road. |
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#11 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 211
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Re: Increase 1967 C20 3/4 ton load carrying..
Drove it 50mi today, getting ready for 200mi round trip soon.
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#12 |
Post Whore
![]() Join Date: Aug 2013
Location: anamosa iowa
Posts: 54,202
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Re: Increase 1967 C20 3/4 ton load carrying..
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#13 |
425hp409
![]() Join Date: Oct 2008
Location: Prosper Texas
Posts: 841
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Re: Increase 1967 C20 3/4 ton load carrying..
I have a set of factory overload springs that you can have if you pay the shipping. They have all the mounting brackets etc.
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Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette |
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