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#1 |
Registered User
Join Date: Jul 2005
Location: Saskatchewan
Posts: 189
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Replacement Floor humps
I have a 2wd cab with A/C and the low hump that is in better shape than the high hump, no A/C I have in this truck. I'd like to swap cabs to get A/C and instead of doing all the rust repair to the 4x4 cab. Is there a company that makes replacement floor humps for 73-87s? I checked Brothers, Classic Industries and LMC but they only have replacement floor pans that don't include the hump.
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__________________
Stu- 1981 GMC Sierra Classic LWB 355- original 2 bolt block, 10.2:1, vortec heads, Comp XE268 cam, built by self in 1992 700R4-2000 stall with lockup, shift kit, Corvette servo 3.07 open diff- I need a 3.73 posi! 2nd owner since 1986 - 388,000 km and counting. 100k by the first owner and the rest by me. |
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#2 |
Senior Member
![]() Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,603
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Re: Replacement Floor humps
Not sure what you are looking to do but I switched my truck from High hump(floor shift) to low hump(automatic) My truck had the removeable hump. I cut the hump section out of an automatic truck and marked the holes and from my high hump, drilled it and bolted it in.
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#3 | |
Registered User
Join Date: Jul 2005
Location: Saskatchewan
Posts: 189
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Re: Replacement Floor humps
Quote:
What year was your cab? I didn't realize there were removeable humps. Posted via Mobile Device
__________________
Stu- 1981 GMC Sierra Classic LWB 355- original 2 bolt block, 10.2:1, vortec heads, Comp XE268 cam, built by self in 1992 700R4-2000 stall with lockup, shift kit, Corvette servo 3.07 open diff- I need a 3.73 posi! 2nd owner since 1986 - 388,000 km and counting. 100k by the first owner and the rest by me. |
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#4 |
Senior Member
![]() Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,603
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Re: Replacement Floor humps
Mine is a 77. You should be able to get an earlier removable 4x4 /standard trans hump
Posted via Mobile Device |
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#5 |
Registered User
![]() Join Date: Apr 2009
Location: New Freedom Pa.
Posts: 1,335
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Re: Replacement Floor humps
I am curious about this swap also, I was thinking of swapping a manual tranny in my 87, but the floor question came up.
Hope someone here has a good answer to this problem, I did not want to do a cab swap either. Desert |
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#6 |
Registered User
Join Date: Nov 2010
Location: Rustville USA or southeast Ia
Posts: 654
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Re: Replacement Floor humps
x2 i want to put a 4 on the floor in my 84 with a low hump
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#7 |
Registered User
Join Date: Dec 2006
Location: connecticut
Posts: 261
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Re: Replacement Floor humps
I actually just did this not too long ago. I replaced the cab on my 4x4 frame with a 2wd automatic cab. I had a removable hump in my old cab and the transfer case hump is spot welded in. I drilled the welds and removed that too. The 2wd cab floor had the seams where the hump would be so I just followed them with my die grinder. I welded in the transfer case hump and I welded square nuts on the bottom of the floor for the tranny hump. It looks factory. I wish I had more pics.
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#8 |
Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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Re: Replacement Floor humps
i also just did this. cut out a low hump to weld in a high hump into my 2x4 to fit a t56
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#9 |
Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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Re: Replacement Floor humps
photos
excuse the mess, and the partial completion, the passenger half was taken down with a flap disc on a grinder, if the new hump wierd its starting to get surface rust as the kids have taken priority the last couple weeks. i hope it helps when you get to this point, sorry i dont know of anyone who reproduces them. they are easy to find in a yard tho, as the center doesnt usually rust out and all manuals and 4x4s had them. the later years were not unboltable tho |
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#10 |
Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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Re: Replacement Floor humps
more photos
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#11 |
Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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Re: Replacement Floor humps
more photos again
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#12 |
Registered User
Join Date: Jul 2005
Location: Saskatchewan
Posts: 189
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Re: Replacement Floor humps
Thanks for the pics, they are really helpful.
I was hoping to spend a few bucks to save some time, but it looks like I can't. I looked at the 4x4 cab and it has the bolt in hump. The 2wd doesn't of course but it looks like removing the 4x4 one and using it as a template is the way to go. Thanks again.
__________________
Stu- 1981 GMC Sierra Classic LWB 355- original 2 bolt block, 10.2:1, vortec heads, Comp XE268 cam, built by self in 1992 700R4-2000 stall with lockup, shift kit, Corvette servo 3.07 open diff- I need a 3.73 posi! 2nd owner since 1986 - 388,000 km and counting. 100k by the first owner and the rest by me. |
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#13 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Replacement Floor humps
my 78-79 jimmys both come out,are they the same style for you
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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