cutting hole for 4 wheel drive in 2 wheel cab. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sdlddiller · 01-25-2011, 08:12 AM

I am putting a 2 wheel drive ,low hump cab on a four wheel drive truck. I was wondering if anyone can tell me the messurement from the firewall,as to where I should cut the hole for the shifter. The truck has a big block,turbo 400 and a np 205 transfer case.

Benelli · 01-25-2011, 11:22 AM

You can buy the hump itself.

bmchevy1979 · 01-25-2011, 11:26 AM

Do you have the cab on the truck becuase I am pretty sure that you will have to put in a 4x4 high hump or run a body lift

**old Rusty C10** · 01-25-2011, 11:32 AM

i would buy the hump and cut the floor so that there is room for the bolts to bolt the new floor hump in. Im sure you can cut the floor and make your own but it wont work as well as the factory stuff and would prolly create a problem when installing the carpet or mat in the truck

sdlddiller · 01-25-2011, 11:47 AM

The truck is an '86, to my truck don't have a bolt in hump.

My cab is settin on my frame, trans and transfer case is, with 2" of clearance.between trans and cab floor.

hayesperformanceplus · 01-25-2011, 01:09 PM

Get just the bolt in hump from a earlier truck and your good to go after cutting the floor. There is a indent where the hole gets cut from factory. That should be it...

PapaBo · 01-25-2011, 03:53 PM

i came across the same problem this past summer, what i ended up doing was measuring some common points in the cabs and marked it and cut it. no need to change out the hump

sdlddiller · 01-25-2011, 04:09 PM

Did you use the bolt in hump for mesureing, or did you just measure from frame rail , firewall, back of cab?

PapaBo · 01-25-2011, 06:52 PM

i used the back of the cab, where the hump meets the firewall and where the sides of the hump met the floor. i dunno what the exact dimensions were i never wrote them down

01-25-2011, 08:12 AM	#1
sdlddiller Registered User Join Date: Jan 2011 Location: bethel,pa Posts: 3	cutting hole for 4 wheel drive in 2 wheel cab. I am putting a 2 wheel drive ,low hump cab on a four wheel drive truck. I was wondering if anyone can tell me the messurement from the firewall,as to where I should cut the hole for the shifter. The truck has a big block,turbo 400 and a np 205 transfer case.

01-25-2011, 11:22 AM	#2
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: cutting hole for 4 wheel drive in 2 wheel cab. You can buy the hump itself. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

01-25-2011, 11:26 AM	#3
bmchevy1979 Registered User Join Date: Dec 2010 Location: Visalia, Ca Posts: 707	Re: cutting hole for 4 wheel drive in 2 wheel cab. Do you have the cab on the truck becuase I am pretty sure that you will have to put in a 4x4 high hump or run a body lift __________________ <Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works. 1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195

01-25-2011, 11:32 AM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: cutting hole for 4 wheel drive in 2 wheel cab. i would buy the hump and cut the floor so that there is room for the bolts to bolt the new floor hump in. Im sure you can cut the floor and make your own but it wont work as well as the factory stuff and would prolly create a problem when installing the carpet or mat in the truck __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-25-2011, 11:47 AM	#5
sdlddiller Registered User Join Date: Jan 2011 Location: bethel,pa Posts: 3	Re: cutting hole for 4 wheel drive in 2 wheel cab. The truck is an '86, to my truck don't have a bolt in hump. My cab is settin on my frame, trans and transfer case is, with 2" of clearance.between trans and cab floor.

01-25-2011, 01:09 PM	#6
hayesperformanceplus Performance Shop Owner Join Date: Oct 2009 Location: Edmonton, Alberta, CANADA Posts: 332	Re: cutting hole for 4 wheel drive in 2 wheel cab. Get just the bolt in hump from a earlier truck and your good to go after cutting the floor. There is a indent where the hole gets cut from factory. That should be it... __________________ 1980 GMC C25 Sierra Classic with 20,000 ORIGINAL MILES (32,000Km's) & Matching numbers 1977 GMC C35 Sierra Classic Crew Cab 454 A/C with 21,000 Miles & Matching numbers 1980 Chevrolet Silverado K20 400 4spd 4X4 74,000km's 1980 GMC C25 Sierra Classic CREW CAB, All Options, with 49,000 Miles 1979 GMC C15 Sierra Classic 454 1989 GMC R3500 CREW CAB 2003 Grand Prix GTP 1998 Regal GS

01-25-2011, 03:53 PM	#7
PapaBo Registered User Join Date: Mar 2010 Location: Macomb IL Posts: 68	Re: cutting hole for 4 wheel drive in 2 wheel cab. i came across the same problem this past summer, what i ended up doing was measuring some common points in the cabs and marked it and cut it. no need to change out the hump

01-25-2011, 04:09 PM	#8
sdlddiller Registered User Join Date: Jan 2011 Location: bethel,pa Posts: 3	Re: cutting hole for 4 wheel drive in 2 wheel cab. Did you use the bolt in hump for mesureing, or did you just measure from frame rail , firewall, back of cab?

01-25-2011, 06:52 PM	#9
PapaBo Registered User Join Date: Mar 2010 Location: Macomb IL Posts: 68	Re: cutting hole for 4 wheel drive in 2 wheel cab. i used the back of the cab, where the hump meets the firewall and where the sides of the hump met the floor. i dunno what the exact dimensions were i never wrote them down



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