The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 73-87 Converting a cab from low to high hump

Tx Firefighter · 02-12-2011, 07:33 PM

To discuss this topic go here- LINK

I have an 85 model low hump cab and have a line on a 78 model SM465 4 speed transmission and the bolt in high hump floor from the same truck. Thing is, I don't have a way to put hands on it right now and see for sure.

My question is, will the high hump cover drop into place if I cut the hole and make arrangements for the hold down bolts ?

This may seem a stupid question, but I know from first hand experience that 60-66 trucks have a different firewall and require a good bit of modding to make it work when swapping low to high. I further know that 67-72 trucks, it's just cut the hole and bolt the hump in place. But, I've never done this on a 73-87 and my current cab is finished to near show quality. If it requires more than cutting a hole and some weld nuts I won't mess with it.

Thank you,
Kevin

02-12-2011, 07:33 PM	#1
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	73-87 Converting a cab from low to high hump To discuss this topic go here- LINK I have an 85 model low hump cab and have a line on a 78 model SM465 4 speed transmission and the bolt in high hump floor from the same truck. Thing is, I don't have a way to put hands on it right now and see for sure. My question is, will the high hump cover drop into place if I cut the hole and make arrangements for the hold down bolts ? This may seem a stupid question, but I know from first hand experience that 60-66 trucks have a different firewall and require a good bit of modding to make it work when swapping low to high. I further know that 67-72 trucks, it's just cut the hole and bolt the hump in place. But, I've never done this on a 73-87 and my current cab is finished to near show quality. If it requires more than cutting a hole and some weld nuts I won't mess with it. Thank you, Kevin __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by N2TRUX; 02-18-2011 at 08:57 PM.