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04-06-2015, 10:44 AM
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#1 |
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Registered User
Join Date: Oct 2011
Location: hudson,wi
Posts: 805
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79 and 81 frame differences ???
I have an 81 C10 short box project and I found a 79 frame for cheap in great condition.......... are they the same frame? Would I run into problems trying to put all the 81 stuff onto the 79 frame? I don't want any extra work. Thanks in advance.
RIZ 
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04-06-2015, 11:13 AM
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#2 |
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Registered User
Join Date: Aug 2011
Location: Gallatin, TN
Posts: 782
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Re: 79 and 81 frame differences ???
One difference that I know of is the front frame horns where the bumper mounts. There may be more but that's all that I'm aware of.
__________________
77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint "Cool ain't ever cheap and cheap ain't ever cool" |
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04-06-2015, 12:30 PM
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#3 |
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Registered User
Join Date: Jan 2007
Location: Garland,TX
Posts: 431
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Re: 79 and 81 frame differences ???
Auto trans cross member is different. Fitting a 73-79 cross member on an 80-87 frame requires spreading the frame a bit and drilling an extra mounting hole. Only really necessary if you want your dual exhaust plumbing to be routed a little cleaner.
In your, case it would be easiest to just get the correct year cross member.
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80 C10 SWB Step Side - 350 w/ vortec heads, TH350, 12-bolt 3.73 |
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04-06-2015, 04:53 PM
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#4 |
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Registered User
Join Date: Jun 2009
Location: Oroville, CA
Posts: 4,827
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Re: 79 and 81 frame differences ???
The 79 frame uses different cab bushings. You might have to oblong a hole for the rear sport bumper. You will need to cut off the frame horns for the front bumper brackets.
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04-06-2015, 09:48 PM
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#5 | |
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Registered User
Join Date: Jun 2011
Location: St Robert, Mo
Posts: 730
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Re: 79 and 81 frame differences ???
Quote:
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