Body mount differences - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67chevy77 · 01-25-2011, 08:25 PM

Im in the middle of swapping my 77 chevy body to an 85 frame. I noticed that the mounts for the rear of the cab are different. I bought new mounts for a 77 thinking they were all the same. The 2 mounts on the 77 sit about an inch or two below the top of the frame, and the 85 sits about flush. Were the newer body style bushings shorter than the 77? all the other mounts look the same except the rear cab mounts.

gchemist · 01-25-2011, 09:12 PM

Check with www.lmctruck.com. You'll notice part numbers are different for mounts.

67chevy77 · 01-25-2011, 09:22 PM

I bought them from summit and didnt think much about it untill I looked yesterday and saw the difference. I saw summit had two different ones but wanted to see if anyone knew. I just got them in today so I think I have a month or so to return them. I was going to try and set the cab on the frame to see if it sits higher in the rear. I just thought it was weired that only the rear mounts would be shorter...

67chevy77 · 01-27-2011, 07:55 PM

Nobody knows? Im almost ready to swap the cabs over but was trying to save some time if I need the newer mount.

*87 chevy silverado* · 01-27-2011, 08:06 PM

u have to have the mounts for that year frame

67chevy77 · 01-27-2011, 08:37 PM

Thanks.Thats what I thought. I never relized the mounts were different learn something new everday. Hopefully thats my only problem with the swap.

*87 chevy silverado* · 01-27-2011, 09:20 PM

shouldnt be.. exept the front bumper mount are different to fyi

67chevy77 · 01-27-2011, 09:24 PM

Yeah I did notice that but it wont be much to mount it up.

*87 chevy silverado* · 01-27-2011, 09:26 PM

any more questions just ask

67chevy77 · 01-27-2011, 09:32 PM

Thanks for the help. Hopefully weekend after next the truck will be back together.

*87 chevy silverado* · 01-27-2011, 09:38 PM

good luck

67chevy77 · 01-29-2011, 06:25 PM

Are the motor mounts any different? Im trying to drop the motor in and it wont sit down all the way. Its just off by a little enough that the bolt wont start. Ive tried pushing and pulling the motor and it wont budge. It looks like if it would go straight down the holes will line up. I just dont understand I have never had a problem dropping a motor in.

wicked77demon · 01-29-2011, 08:34 PM

You need the cab mount for the year of frame your going to be using. I put a 76 cab on my 85 frame and had to order the bushings for 80-87 trucks.

67chevy77 · 01-29-2011, 08:38 PM

Yeah I sent my other ones back and got the newer ones. Now the motor wont sit in the mounts so tomorrow im going to see whats different ( If any) on my 77 frame from the new frame.

DBLSPRT68 · 01-30-2011, 10:10 AM

Quote:

Originally Posted by 67chevy77

Are the motor mounts any different? Im trying to drop the motor in and it wont sit down all the way. Its just off by a little enough that the bolt wont start. Ive tried pushing and pulling the motor and it wont budge. It looks like if it would go straight down the holes will line up. I just dont understand I have never had a problem dropping a motor in.

I believe there was a design change between 77 and 85. The newer style has a locking device made into it, where the older was just solid rubber. Still should be roughly the same. I WOULD JUST LOOSEN ALL THE MOUNTS (frame and engine)UP JUST A LTTLE, just enough to move. Then try and drop it in. It propbably just needs a little give that it can't get! David

67chevy77 · 01-30-2011, 10:19 AM

Well I tried take loose the mount some and even took it all the way out and tried it different ways and still wouldnt go. Summit says the mounts work on 1975 to 86 with a 350 4x4. Unless they sent me the wrong mounts or im just not seeing something im at a lost.

DBLSPRT68 · 01-30-2011, 11:00 AM

If you didn't loosen the frame mounts, do that. They aren't very easy to do...... You have to hold the bolt heads with a wrench inside the crossmember while loosening the nut outside. Do it just enough to move. That might do the trick?

67chevy77 · 01-30-2011, 02:38 PM

Didn't think about that but wish I did. But I did finally get it to sit in the mounts and bolt it up. But what a PITA it was. Anyway all there is to do now is drill ne wholes for the crossmember for the transfercase, throw the cab on it, and wire everthing back up. Once I get everything done ill try and share some pictures.

DBLSPRT68 · 01-30-2011, 02:45 PM

Glad to hear you got it in! YEA!!!!!!

01-25-2011, 08:25 PM	#1
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Body mount differences Im in the middle of swapping my 77 chevy body to an 85 frame. I noticed that the mounts for the rear of the cab are different. I bought new mounts for a 77 thinking they were all the same. The 2 mounts on the 77 sit about an inch or two below the top of the frame, and the 85 sits about flush. Were the newer body style bushings shorter than the 77? all the other mounts look the same except the rear cab mounts. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-25-2011, 09:12 PM	#2
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Body mount differences Check with www.lmctruck.com. You'll notice part numbers are different for mounts. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-25-2011, 09:22 PM	#3
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences I bought them from summit and didnt think much about it untill I looked yesterday and saw the difference. I saw summit had two different ones but wanted to see if anyone knew. I just got them in today so I think I have a month or so to return them. I was going to try and set the cab on the frame to see if it sits higher in the rear. I just thought it was weired that only the rear mounts would be shorter... __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-27-2011, 07:55 PM	#4
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Nobody knows? Im almost ready to swap the cabs over but was trying to save some time if I need the newer mount. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-27-2011, 08:06 PM	#5
87 chevy silverado Account Suspended Join Date: Apr 2009 Location: lexington South Carolina Posts: 2,124	Re: Body mount differences u have to have the mounts for that year frame

01-27-2011, 08:37 PM	#6
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Thanks.Thats what I thought. I never relized the mounts were different learn something new everday. Hopefully thats my only problem with the swap. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-27-2011, 09:20 PM	#7
87 chevy silverado Account Suspended Join Date: Apr 2009 Location: lexington South Carolina Posts: 2,124	Re: Body mount differences shouldnt be.. exept the front bumper mount are different to fyi

01-27-2011, 09:24 PM	#8
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Yeah I did notice that but it wont be much to mount it up. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-27-2011, 09:26 PM	#9
87 chevy silverado Account Suspended Join Date: Apr 2009 Location: lexington South Carolina Posts: 2,124	Re: Body mount differences any more questions just ask

01-27-2011, 09:32 PM	#10
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Thanks for the help. Hopefully weekend after next the truck will be back together. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-27-2011, 09:38 PM	#11
87 chevy silverado Account Suspended Join Date: Apr 2009 Location: lexington South Carolina Posts: 2,124	Re: Body mount differences good luck

01-29-2011, 06:25 PM	#12
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Are the motor mounts any different? Im trying to drop the motor in and it wont sit down all the way. Its just off by a little enough that the bolt wont start. Ive tried pushing and pulling the motor and it wont budge. It looks like if it would go straight down the holes will line up. I just dont understand I have never had a problem dropping a motor in. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-29-2011, 08:34 PM	#13
wicked77demon Registered User Join Date: Sep 2008 Location: Stillwater, Pa Posts: 7	Re: Body mount differences You need the cab mount for the year of frame your going to be using. I put a 76 cab on my 85 frame and had to order the bushings for 80-87 trucks.

01-29-2011, 08:38 PM	#14
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Yeah I sent my other ones back and got the newer ones. Now the motor wont sit in the mounts so tomorrow im going to see whats different ( If any) on my 77 frame from the new frame. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-30-2011, 10:19 AM	#16
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Well I tried take loose the mount some and even took it all the way out and tried it different ways and still wouldnt go. Summit says the mounts work on 1975 to 86 with a 350 4x4. Unless they sent me the wrong mounts or im just not seeing something im at a lost. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.



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01-30-2011, 11:00 AM	#17
DBLSPRT68 Registered User Join Date: Nov 2000 Location: Ft. Mill, SC USA Posts: 931	Re: Body mount differences If you didn't loosen the frame mounts, do that. They aren't very easy to do...... You have to hold the bolt heads with a wrench inside the crossmember while loosening the nut outside. Do it just enough to move. That might do the trick? __________________ PROJECT TRUCK: 1985 SWB C10 Silverado Black/Charcoal, 1990 V2500 Suburban, 2018 Suburban, 2005 GMC 2500HD CCSB, 2014 Toyota Camry SE, HAD.....1968 Camaro RS/SS Family owned since new; 350 3 speed SOLD

01-30-2011, 02:38 PM	#18
67chevy77 Registered User Join Date: Jan 2009 Location: Saluda, Virginia Posts: 131	Re: Body mount differences Didn't think about that but wish I did. But I did finally get it to sit in the mounts and bolt it up. But what a PITA it was. Anyway all there is to do now is drill ne wholes for the crossmember for the transfercase, throw the cab on it, and wire everthing back up. Once I get everything done ill try and share some pictures. __________________ Justin 1977 chevrolet rebuilt 350 9 inches of lift with 40s 4.56 gears. Work in progress. 1967 4x4 -sold- 1988 reg cab short bed 4x4 -sold- 1999 GMC extended cab short bed new body style Lifted on 33s.

01-30-2011, 02:45 PM	#19
DBLSPRT68 Registered User Join Date: Nov 2000 Location: Ft. Mill, SC USA Posts: 931	Re: Body mount differences Glad to hear you got it in! YEA!!!!!! __________________ PROJECT TRUCK: 1985 SWB C10 Silverado Black/Charcoal, 1990 V2500 Suburban, 2018 Suburban, 2005 GMC 2500HD CCSB, 2014 Toyota Camry SE, HAD.....1968 Camaro RS/SS Family owned since new; 350 3 speed SOLD

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