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

Travis K · 08-21-2007, 03:04 AM

I have a 70 2wd lwb that I am going to be swapping onto a 68 4wd frame. When I took the cab off of the 2wd drive frame this weekend, I noticed that the cab mounts were different than the 4wd frame. The 2wd mounts were flush with the top of the frame, and the 4wd were about 1" - 1.5" below the top of the frame. Is this a normal difference between a 2wd and 4wd frame?
I would like to know if I need to do some mods to the frame before I stash the 2wd frame in storage. Thanks guys.

1969k10stepside · 08-21-2007, 06:23 PM

The 2wd 1/2 ton use different mounting than 3/4 ton 2wd and all the k series (4wd).The cab will go on w/out mods.Just specify when you get cab mounts that it is for a 4wd and that will get you the right rubber mounts.The 2wd ones wont work.So,that's what you need--4wd rubber cab mounts,that's it,And also a "high hump" floor if you dont have one already in the cab

xshadow · 08-21-2007, 07:17 PM

are the cab mounts the same on a 2wd 3/4 ton as a 1/2 ton 4x4?

1969k10stepside · 08-21-2007, 07:19 PM

Yes

xshadow · 08-21-2007, 07:49 PM

I thought so. my trucks aren't stored at home and I didn't really pay attention to it. I looked at the pictures I have and they do look the same.

xshadow · 08-21-2007, 07:53 PM

If it has an auto trans the cab will clear everything alright without the high hump.
I've seen one without the high hump(not my truck). I also just sit my cab on the frame and it seems to have worked. I'm still going to cut it out and put in a high hump just in case I ever need to swap engines. Without it I don't know how you would get to the bolts.

eedgell · 08-21-2007, 08:08 PM

If the T case is to be installed the high hump will be needed.

xshadow · 08-21-2007, 10:58 PM

I can take pictures if you would like. I have a 1/2 ton 4x4 with a cab bolted to the frame. No high hump. I haven't cut a hole for the shifter yet. It has a 350. with an auto trans and transfer case. the engine trans and transfer case was on the frame before I put the cab on it. Here are the only pictures that I have

xshadow · 08-21-2007, 11:02 PM

xshadow · 08-21-2007, 11:12 PM

is the hump in this truck higher than a normal low hump cab? Have you guys tried to put a low hump cab on a 4x4 frame and it wouldn't work? I'm wondering why mine worked but it looks like everyone else has a problem with it...I will be installing a high hump so I have access to the trans bolts in case i ever have to change it. besides it is correct to have a high hump so i'm going with that sit up although I don't HAVE to.

xshadow · 08-21-2007, 11:41 PM

the hump is much lower than the high hump that I got from a board member. the picture my make the hump look taller than it is.

Travis K · 08-22-2007, 12:11 AM

Thanks for the input. Glad I wasn't just imagining the difference. I did score the high hump out of the donor truck. I have already cut the hole in the 2wd cab. What should I use between the two panels when I bolt it down to keep the water and grime out of the cab?

08-21-2007, 03:04 AM	#1
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Cab mount question I have a 70 2wd lwb that I am going to be swapping onto a 68 4wd frame. When I took the cab off of the 2wd drive frame this weekend, I noticed that the cab mounts were different than the 4wd frame. The 2wd mounts were flush with the top of the frame, and the 4wd were about 1" - 1.5" below the top of the frame. Is this a normal difference between a 2wd and 4wd frame? I would like to know if I need to do some mods to the frame before I stash the 2wd frame in storage. Thanks guys.

08-21-2007, 06:23 PM	#2
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: Cab mount question The 2wd 1/2 ton use different mounting than 3/4 ton 2wd and all the k series (4wd).The cab will go on w/out mods.Just specify when you get cab mounts that it is for a 4wd and that will get you the right rubber mounts.The 2wd ones wont work.So,that's what you need--4wd rubber cab mounts,that's it,And also a "high hump" floor if you dont have one already in the cab Last edited by 1969k10stepside; 08-21-2007 at 06:25 PM.

08-21-2007, 07:17 PM	#3
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question are the cab mounts the same on a 2wd 3/4 ton as a 1/2 ton 4x4?

08-21-2007, 07:19 PM	#4
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: Cab mount question Yes

08-21-2007, 07:49 PM	#5
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question I thought so. my trucks aren't stored at home and I didn't really pay attention to it. I looked at the pictures I have and they do look the same.

08-21-2007, 07:53 PM	#6
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question If it has an auto trans the cab will clear everything alright without the high hump. I've seen one without the high hump(not my truck). I also just sit my cab on the frame and it seems to have worked. I'm still going to cut it out and put in a high hump just in case I ever need to swap engines. Without it I don't know how you would get to the bolts.

08-21-2007, 08:08 PM	#7
eedgell It's the air up here Join Date: Mar 2007 Location: Western Colorado Posts: 710	Re: Cab mount question If the T case is to be installed the high hump will be needed. __________________ 1971 cheyenne k10 4 speed np 205 454 BB factory a/c Never drink down stream of the herd! Eric

08-21-2007, 10:58 PM	#8
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question I can take pictures if you would like. I have a 1/2 ton 4x4 with a cab bolted to the frame. No high hump. I haven't cut a hole for the shifter yet. It has a 350. with an auto trans and transfer case. the engine trans and transfer case was on the frame before I put the cab on it. Here are the only pictures that I have Last edited by xshadow; 08-21-2007 at 11:01 PM.

08-21-2007, 11:02 PM	#9
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question

08-21-2007, 11:12 PM	#10
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question is the hump in this truck higher than a normal low hump cab? Have you guys tried to put a low hump cab on a 4x4 frame and it wouldn't work? I'm wondering why mine worked but it looks like everyone else has a problem with it...I will be installing a high hump so I have access to the trans bolts in case i ever have to change it. besides it is correct to have a high hump so i'm going with that sit up although I don't HAVE to.

08-21-2007, 11:41 PM	#11
xshadow Registered User Join Date: Apr 2006 Location: va Posts: 553	Re: Cab mount question the hump is much lower than the high hump that I got from a board member. the picture my make the hump look taller than it is.

08-22-2007, 12:11 AM	#12
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: Cab mount question Thanks for the input. Glad I wasn't just imagining the difference. I did score the high hump out of the donor truck. I have already cut the hole in the 2wd cab. What should I use between the two panels when I bolt it down to keep the water and grime out of the cab?

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