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#1 |
Registered User
Join Date: Jun 2007
Location: DFW (Forney)
Posts: 1,529
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70' axle length question
Ive determined that my 70 swb truck has the earlier (narrower) rearend.While theres plenty of 5 lug axle swap kits for the 5 lug conversion Im wanting to do out there ,none of them list the option for the difference between the earlier and later rearend widths. (70' was the. change over year)
How do I know which kit to order? The axles are 30.5" long so unless Ive done my research wrong somewhere Im certain I have the narrower housing.
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'58 SWB Fleetside...Front & Rear Porterbuilt Dropmember, 6.0 LS /4L60E. Accuair E-level, 20 Billet Specialties (Vintecs) '63 Buick Riviera ... AccuAir E-level, 20" Billet Specialties (Vintecs) http://67-72chevytrucks.com/vboard/s...=528853&page=5 |
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#2 |
Registered User
Join Date: Sep 2006
Location: Riverton KS
Posts: 832
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Re: 70' axle length question
You are correct, you do have the narrower rear end that was in some 70 models. The wider axles are 31 5/16" If I remember correctly.
Here are some from Summit that will work https://www.summitracing.com/parts/c...FYMCaQodz9cNHQ Any 5 lug conversion axles that are listed for 63-69s will work. If you have the wider 70 rear end like I have in mine, you would just buy 71-72 stock replacement axles. Hope this helps!
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1970 SWB Build Last edited by jmking9; 11-13-2016 at 10:54 PM. |
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#3 |
Registered User
Join Date: Jun 2007
Location: DFW (Forney)
Posts: 1,529
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Re: 70' axle length question
If Im sticking with the drum brakes which drums are compatible with these axles from Summit?
__________________
'58 SWB Fleetside...Front & Rear Porterbuilt Dropmember, 6.0 LS /4L60E. Accuair E-level, 20 Billet Specialties (Vintecs) '63 Buick Riviera ... AccuAir E-level, 20" Billet Specialties (Vintecs) http://67-72chevytrucks.com/vboard/s...=528853&page=5 |
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#4 |
Registered User
Join Date: Nov 2016
Location: Albuquerque, NM
Posts: 110
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Re: 70' axle length question
The local used auto parts dealer told me that I can use the longer axles if I also use the 2¾" brakes. I'm going to try it this winter.
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#5 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: 70' axle length question
Quote:
I assumed that's what everyone was using. I've never done the swap myself.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#6 |
Registered User
Join Date: Jun 2007
Location: DFW (Forney)
Posts: 1,529
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Re: 70' axle length question
I ordered a kit that comes with drums today, Ill keep you guys posted on how it works
__________________
'58 SWB Fleetside...Front & Rear Porterbuilt Dropmember, 6.0 LS /4L60E. Accuair E-level, 20 Billet Specialties (Vintecs) '63 Buick Riviera ... AccuAir E-level, 20" Billet Specialties (Vintecs) http://67-72chevytrucks.com/vboard/s...=528853&page=5 |
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#7 |
Registered User
Join Date: Jan 2014
Location: Illinois
Posts: 131
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Re: 70' axle length question
Running into this exact situation. Gonna stay tuned in
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71 C10 Finally took a leap and did the 5.3 4l80e swap. Running the Holley Terminator Xmax. Still working bugs out. ![]() |
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#8 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 70' axle length question
FWIW -
I have a narrow 6-lug axle on my 70 and I added bolt on 1 1/2" spacers and it tucked the wheels right out to the sides of the bed. Running 15x8 stock steel wheels with 31x11.50 15 with 3" cpp drop springs and 1" block
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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