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06-09-2022, 04:46 PM
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#1 |
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Registered User
Join Date: May 2016
Location: Orange Park, FL
Posts: 191
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Locating core support
At some point in its history my 3600 took a hit to the front hard enough to damage the front cross member and apparently the core support. As seen in the attached pics the "repair" involved "welding" 1/2" plate on both the underside and upperside of the lower support member. (Not pretty but it worked.) To position the core support how far above the cross member should the core support sit (ignoring the 1/2" plate)? I know it eventually gets shimmed as needed to position the front clip and hood but as a starting point, what is the distance between the core support and the cross member? Got a new radiator coming and want to install and plumb it and run trans cooler lines.
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Al '51 3600, LS5.3, 4L60e, Danforth cross., Blazer front susp., Borg Warner 9 bolt 3.27 GR, Wrangler leafs |
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06-10-2022, 08:14 PM
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#2 |
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Registered User
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,711
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Re: Locating core support
I couldn't find my crossmember that I have out. Too many stashes of stuff around here
and it is raining again. Since you have the MII crossmember you actually don't need that bent up crossmember you just need a radiator support crossmember at the right height. That would be low enough to compensate for the plate on the bottom of the core support and allow for a rubber pad and shims to dial it in exact. The rubber pad on mine is a piece I cut out of the sidewall of an old tire.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. Last edited by mr48chev; 06-10-2022 at 08:28 PM. |
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06-11-2022, 02:57 PM
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#3 |
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Registered User
Join Date: May 2016
Location: Orange Park, FL
Posts: 191
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Re: Locating core support
Cross member is not damaged enough to replace for my purposes and seems to be sitting at the proper height. The plate on the bottom of the core support is sitting directly on the crossmember in the pic but that is not where it should be (just mock up). When I look at aftermarket core supports there are two standoffs(?) on the bottom of the core support. They appear taller than the 1/2" plate I have on mine. If I could get a dimension for the height of those standoffs I could then figure out a spacer to locate what I have at the correct height prior to "shimming to fit".
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Al '51 3600, LS5.3, 4L60e, Danforth cross., Blazer front susp., Borg Warner 9 bolt 3.27 GR, Wrangler leafs |
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06-12-2022, 02:18 PM
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#4 |
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Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,711
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Re: Locating core support
To get the most accurate measurement with that tape I "burned a foot" as my carpenter friends used to say so I could get a spot on measurement.
__________________
Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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06-12-2022, 03:00 PM
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#5 |
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Registered User
Join Date: May 2016
Location: Orange Park, FL
Posts: 191
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Re: Locating core support
5/8" "Ripper" as my British carpenter friend says. You da man mr48chev! Thank you so much.
__________________
Al '51 3600, LS5.3, 4L60e, Danforth cross., Blazer front susp., Borg Warner 9 bolt 3.27 GR, Wrangler leafs |
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