Cab swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77K20 · 06-13-2004, 12:33 AM

Ok, I did a search but didn't come up with what I needed. I have a 77 4wd 3/4T with a 4-speed that I want to start makin pretty. I also have a 77 2wd 3/4T with a 4-speed that is my parts truck. I need to know if the 2wd cab will fit on the 4wd. These two truck are almost identical, except one is 4wd and the other is 2wd. The cab on the 4wd has seen better days, and the 2wd cab is in alot better condition, so if I can I want to swap them. Is this possible or will I run into issues with the t-case and all that on the 4wd? Thanks for any info.

-Brandon

plumbcut · 06-13-2004, 02:31 PM

if you remove the carpet in both of them you can see that they have different inspection covers over the transmission. The 2WD may or may not be removeable. that should be your only issue. If they both unbolt, keep the 4WD one obviously since the holes are in the right place for your trans/t-case shifters. This has been a real grey area over the years with these trucks and its hard to get a real real firm reliable answer (especially one that covers all years & setups) but Im going to go with 95% on your setup. If the 2WD one is not removeable you will have to get out the sawzall or grinder or plasma cutter and do some custom work but it shouldnt be too hard. Well worth it if the 2WD cab is in good shape.

The only other major difference that comes to mind is the AC vs. NON-AC firewalls.. They are not the same. Good luck and post some pics!!

plumbcut

77K20 · 06-13-2004, 08:17 PM

Sorry, don't have any pics as of yet. What problems might I face with A/c? The 2wd has A/C while the 4wd does not. Will this be a problem? I really don't care too much about A/C so I don't care if I won't be able to use it asfter the swap, but are there other issues I should know about before starting? Thanks for your info.

-Brandon

rolson1039 · 06-13-2004, 08:17 PM

if i remember correct you can use them youll have to cut the 2wd floor so you can bolt in the 4x4 piece

beaterC10 · 06-14-2004, 08:46 AM

The A/C and non A/C cabs have different size holes in the firewall for the heater core box. To change from one to the other will require some surgery on the firewall.

06-13-2004, 12:33 AM	#1
77K20 Registered User Join Date: Jun 2003 Location: Estacada, OR Posts: 37	Cab swap question Ok, I did a search but didn't come up with what I needed. I have a 77 4wd 3/4T with a 4-speed that I want to start makin pretty. I also have a 77 2wd 3/4T with a 4-speed that is my parts truck. I need to know if the 2wd cab will fit on the 4wd. These two truck are almost identical, except one is 4wd and the other is 2wd. The cab on the 4wd has seen better days, and the 2wd cab is in alot better condition, so if I can I want to swap them. Is this possible or will I run into issues with the t-case and all that on the 4wd? Thanks for any info. -Brandon

06-13-2004, 08:17 PM	#4
rolson1039 Registered User Join Date: Oct 2002 Location: NJ Posts: 404	if i remember correct you can use them youll have to cut the 2wd floor so you can bolt in the 4x4 piece __________________ so many trucks so little time!!!

06-13-2004, 02:31 PM	#2
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	if you remove the carpet in both of them you can see that they have different inspection covers over the transmission. The 2WD may or may not be removeable. that should be your only issue. If they both unbolt, keep the 4WD one obviously since the holes are in the right place for your trans/t-case shifters. This has been a real grey area over the years with these trucks and its hard to get a real real firm reliable answer (especially one that covers all years & setups) but Im going to go with 95% on your setup. If the 2WD one is not removeable you will have to get out the sawzall or grinder or plasma cutter and do some custom work but it shouldnt be too hard. Well worth it if the 2WD cab is in good shape. The only other major difference that comes to mind is the AC vs. NON-AC firewalls.. They are not the same. Good luck and post some pics!! plumbcut

06-14-2004, 08:46 AM	#5
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	The A/C and non A/C cabs have different size holes in the firewall for the heater core box. To change from one to the other will require some surgery on the firewall.



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