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#1 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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cab shims
well I'm putting my truck back together and it seems like I need almost 3/8 of shims in front cab mounts to get the fender/door gap nice.Is this common?I could have cut down the rad support bushings to bring it down but I went with the shims I have all new bushings
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SCREAMIN EAGLE |
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#2 |
Registered User
Join Date: Nov 2001
Location: Concord, NC
Posts: 2,489
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Re: cab shims
I vote make the adjustments at the raditor support
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#3 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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Re: cab shims
how would I cut down a bushing,its molded with 2 pieces of metal
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SCREAMIN EAGLE |
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#4 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: cab shims
I use large washers for shims.
I have tried to reduce the radiator support bushings but what I have found is that you almost have to go with no supports at the radiator in order to get the results equivalent to 1/4" shims under the body. I have not seen any problems from shimming under the body. Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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#5 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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Re: cab shims
thanks for the replies-I have a extra bushing and I will cut that down and use it as a shim instead of the shims I have
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SCREAMIN EAGLE |
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#6 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: cab shims
Just some info here.The radiator core mounts are different from a 67-68 to 69-72.If you bought a complete cab mount kit from a vendor,it most likely has 69-72 core support mounts/bushings which IIRC are taller than the 67-68 ones.This can cause alignment problems with the front fender/cab.
I haven't done one but have been there when a vendor discussed this with a customer.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#7 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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Re: cab shims
I have a 70 4x4 which are taller the older or newer?
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SCREAMIN EAGLE |
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#8 |
Registered User
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Location: Chesapeake Beach, MD
Posts: 812
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Re: cab shims
there should also be a square washer/plate that goes on top the bushing. i dont see it in that pic...
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71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 ![]() http://i195.photobucket.com/albums/z...en58/001-2.jpg |
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#9 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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Re: cab shims
did not see that,will add tomorrow
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SCREAMIN EAGLE |
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#10 |
Registered User
![]() Join Date: Jan 2008
Location: Chesapeake Beach, MD
Posts: 812
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Re: cab shims
LMC's book is a good reference if you need it
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71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 ![]() http://i195.photobucket.com/albums/z...en58/001-2.jpg |
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#11 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: cab shims
Here is a pic of mine I found on this computer. I was removing the 6cyl. crossmember in this pic.
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#12 |
Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Re: cab shims
I had the same problem when I did my '69 2x4. I wasn't sure if it was the aftermarket radiator support or the mounts, but I had to shim the cab up to get the fender to door gap right. I couldn't understand it, because the original radiator support was rotted and had no mounts in it, and the fender to door gaps were fine. I thought maybe the mounts on the radiator support were too low or something.
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered ![]() ![]() ![]() |
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#13 |
screamin eagle
Join Date: Oct 2007
Location: westbury ny
Posts: 237
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Re: cab shims
I redid the shims and it came out nice-everything lines up
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SCREAMIN EAGLE |
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#14 |
72 GMC
Join Date: Feb 2008
Location: Wells, Maine
Posts: 534
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Re: cab shims
Looks great !
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#15 |
Registered User
Join Date: May 2006
Location: at work
Posts: 2,552
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Re: cab shims
Great looking truck!
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R.I.P. Killer 71 10/26/07 |
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#16 |
Registered User
Join Date: Feb 2007
Location: Colorado Springs, Co
Posts: 1,939
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Re: cab shims
I have a 72 but am using a 67-68 front clip, am I going to have similar problem?
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#17 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: cab shims
You probably need to use the 67-68 core support mounts is the only thing I can think of.IIRC the later bushings are taller but it could be the other way around.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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