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04-20-2022, 06:53 PM
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#1 |
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Senior Member
  
Join Date: Jan 2002
Location: Burghill, Ohio 44404
Posts: 3,401
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Frame difference from 1970 to 1972
Have a 1970 jimmy got a 1971 frame to put on it hole in the frame for the drum brake lines in the front not their must have move them for disks brakes is their a way to put that hole in the frame. All ready bought the brake lines for the drum brakes.
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  1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396 |
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04-21-2022, 06:41 AM
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#2 |
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Senior Member
Join Date: May 2011
Location: Greencastle PA
Posts: 6,807
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Re: Frame difference from 1970 to 1972
I converted a 70 to disc brakes and just drilled new holes.
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04-21-2022, 12:17 PM
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#3 |
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Senior Member
Join Date: Jan 2002
Location: Burghill, Ohio 44404
Posts: 3,401
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Re: Frame difference from 1970 to 1972
It looks like the hole for the disc brakes is just a round hole but for the drum brakes
It's not look at the pictures brake line has to lock in it so it don't turn.
__________________
1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396 |
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04-21-2022, 02:18 PM
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#4 |
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Senior Member
Join Date: May 2011
Location: Greencastle PA
Posts: 6,807
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Re: Frame difference from 1970 to 1972
If I remember correctly, the 71 and 72 is a round hole with a flat spot. I tried drilling the hole smaller and then burr grinding it so i would have the flat spot but by the time it was done it was round, lol.
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04-21-2022, 09:34 PM
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#5 |
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Senior Member
Join Date: Jan 2002
Location: Burghill, Ohio 44404
Posts: 3,401
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Re: Frame difference from 1970 to 1972
Think I will just put the disks brakes on it.
__________________
1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396 |
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04-22-2022, 11:26 AM
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#6 |
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Carpe manana
  
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,449
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Re: Frame difference from 1970 to 1972
Happened upon this thread - not sure if helpful but here it is: https://67-72chevytrucks.com/vboard/...d.php?t=823192
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308  Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland
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04-23-2022, 07:39 AM
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#7 |
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Registered User
Join Date: Aug 2006
Location: LaSalle Mi
Posts: 525
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Re: Frame difference from 1970 to 1972
It would be a bit of a pain to replace the hole. You would have to drill the hole then file the triple squares in.
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