The 1947 - Present Chevrolet & GMC Truck Message Board Network

Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board


Thread Tools Display Modes
Old 11-14-2017, 08:31 PM   #1
Truck and auto performance nut
68GMCCustom's Avatar
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,844
Low hump removal/High hump install questions?

I'm doing a low to high hump swap(? or call it a low to high trans tunnel swap?) and had a couple of questions for those that have done it.

1st, I have cut out the low hump and loosely fitted the used high hump I got from a member here...are there any special details involving fitting it/drilling holes , etc. that I should be aware of?

2nd....whats everyone sealing there tunnels up with? Some type of narrow peel and stick insulation tape? Something like a tube of silicone or some seam sealer? Something else?

I will also be reinstalling my B&M Truck Megashifter to the floor/hump that will get a lot of abuse, and wondered how much that might effect the sealing system used.
Kurt -

'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'16 Kia Sorento - wife's econo-driver

my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken
68GMCCustom is offline   Reply With Quote
Old Yesterday, 01:12 PM   #2
Registered User
CharlieBrown's Avatar
Join Date: Dec 2007
Location: Van Buren Arkansas
Posts: 98
Re: Low hump removal/High hump install questions?

All I did was to notch the low cab for clearance..did not cut the entire opening out.I then fitted the high hump plate over it ....sealed it with camper shell tape and drilled with self tapping screws with rubber washers.
1972 Cheyenne Super..owned since 1978
1972 Surburban 4x4
1972 Cheyenne 4x4 3/4 ton
1972 Cheyenne 2wd...named Death Row
CharlieBrown is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 10:41 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013