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03-19-2019, 07:35 PM
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#1 |
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Registered User
Join Date: May 2018
Location: Illinois
Posts: 40
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Stringing up the frame
Before I send the frame out I want to string it up to check squareness. At 1 time I found a post for what dimensions to check but it’s lost to me.
On another note, Anyone happen to have a measurement for the rear frame rail height? I am Installing the rear frame crossmember and ran into the issue below. The crossmember is sitting on the bottom rail. Doesn’t appear that way because of the perspective.  Thanks for the help. Last edited by Lord_glum; 03-19-2019 at 08:29 PM. |
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03-19-2019, 07:52 PM
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#2 |
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Senior Member
  
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,333
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Re: Stringing up the frame
Rear frame rail height is 4.1/10" OD.
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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03-19-2019, 08:12 PM
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#3 |
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Registered User
Join Date: May 2018
Location: Illinois
Posts: 40
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Re: Stringing up the frame
I should clarify it’s a 68 shortbed.
My frame measures: 3 7/8 id inside rail 4 3/16 od top to bottom of the outside. |
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03-19-2019, 11:05 PM
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#4 |
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Senior Member
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Stringing up the frame
this should help
__________________
 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
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03-20-2019, 10:44 AM
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#5 |
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Registered User
Join Date: Jul 2016
Location: Elkhart, Indiana
Posts: 292
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Re: Stringing up the frame
Just a word of advise, when trying to find square. GM's measurements are very, lets say "loose". Don't be surprised if the frame is 1/2-3/4" out of square. Also, check with a body shop that has a frame machine to see what the collision safe measurements are. Last frame I cut down a frame, the frame to start with was 9/16" out of square but that was okay according to specs from a body shop.
__________________
1967 Chevy C20 to K20 Conversion "Simply Toxic" http://67-72chevytrucks.com/vboard/s...d.php?t=749409 1971 Chevy C20 Custom Camper LS Swap http://67-72chevytrucks.com/vboard/s...d.php?t=763775 |
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03-20-2019, 10:23 PM
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#6 |
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Registered User
Join Date: May 2018
Location: Illinois
Posts: 40
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Re: Stringing up the frame
Thank you all for the help and information. I will use this later this week when I hope to have this completed.
I also found I was shipped the wrong crossmember and the new 1 is in the mail. Thanks for the help. |
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