how to identify high hump vs low hump?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

catmull32 · 04-25-2010, 02:50 PM

I was just wondering if anyone could explain to me what the difference is and how to identify them

Leviticus · 04-25-2010, 02:58 PM

Here ya go.

http://67-72chevytrucks.com/vboard/s...=low+hump+high

72freak · 04-25-2010, 03:01 PM

High hump is bolted in.

**special-K** · 04-25-2010, 09:39 PM

High hump comes up as high as the seat bottom in front of the seat.

1969C10shortbed · 04-25-2010, 11:53 PM

I think mine came factory low hump, but it has a shifter on the floor. The hump looks hastily cut. If I were to replace the entire floor (yes, it needs it) should I go with a high hump? I plan on swapping a T56 or similar into it behind a big block later on.

**special-K** · 04-26-2010, 08:44 AM

Only low hump floors are made.You can cut and install a high hump,though.

catmull32 · 04-26-2010, 03:57 PM

Two wheel drive floor pan vs four wheel drive floor pan? Are they the same?

**68350** · 04-26-2010, 04:06 PM

only if the 2 wheel drive had a high hump. all 4wd had high hump.

**special-K** · 04-26-2010, 07:07 PM

Quote:

Originally Posted by catmull32

Two wheel drive floor pan vs four wheel drive floor pan? Are they the same?

The pans are the same and interchangeable.Only the hump itself is different.As 68350 said,all 4wds had high-hump and only big block or 4spd 2wds did.But,the impression is there for the bolting surface of the high hump.GM offered replacement cabs for a while,but only non-air low-hump.Instructions were included for adapting for both a/c and high-hump.

1969C10shortbed · 04-30-2010, 12:30 AM

Quote:

Originally Posted by special-K

Only low hump floors are made.You can cut and install a high hump,though.

http://www.classicparts.com/1969-72-...tinfo/45-920B/

So this one is unfortunately a low-hump? And I would need a tall hump?

**special-K** · 04-30-2010, 10:33 AM

Yes,you can cut the hump out,lay high hump over,drill through mounting hole locations,tack nuts underneath,and you`re done.This is what I`ll be doing on my rust free California cab for my`67 project.I`m using an M22 4spd (which works under a low hump) and I want a high hump for easier access to the shifter assembly.It`s a pain to mess with that stuff all up against the floor and over the transmission.

1969C10shortbed · 05-02-2010, 05:54 PM

Alright, thanks for the info!

Chris

04-25-2010, 02:50 PM	#1
catmull32 Registered User Join Date: Apr 2010 Location: heyburn, idaho Posts: 61	how to identify high hump vs low hump?? I was just wondering if anyone could explain to me what the difference is and how to identify them

04-25-2010, 02:58 PM	#2
Leviticus Shake and Bake! Join Date: Feb 2010 Location: Central Coast, CA Posts: 609	Re: how to identify high hump vs low hump?? Here ya go. http://67-72chevytrucks.com/vboard/s...=low+hump+high __________________ "All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA"

04-25-2010, 03:01 PM	#3
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: how to identify high hump vs low hump?? High hump is bolted in. __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

04-25-2010, 09:39 PM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: how to identify high hump vs low hump?? High hump comes up as high as the seat bottom in front of the seat. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

04-25-2010, 11:53 PM	#5
1969C10shortbed Registered User Join Date: Feb 2010 Location: El Paso, TX Posts: 55	Re: how to identify high hump vs low hump?? I think mine came factory low hump, but it has a shifter on the floor. The hump looks hastily cut. If I were to replace the entire floor (yes, it needs it) should I go with a high hump? I plan on swapping a T56 or similar into it behind a big block later on.

04-26-2010, 08:44 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: how to identify high hump vs low hump?? Only low hump floors are made.You can cut and install a high hump,though. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

04-26-2010, 03:57 PM	#7
catmull32 Registered User Join Date: Apr 2010 Location: heyburn, idaho Posts: 61	Re: how to identify high hump vs low hump?? Two wheel drive floor pan vs four wheel drive floor pan? Are they the same?

04-26-2010, 04:06 PM	#8
68350 Senior Member Join Date: Jan 2002 Location: Williston, ND Posts: 2,999	Re: how to identify high hump vs low hump?? only if the 2 wheel drive had a high hump. all 4wd had high hump. __________________ 68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi

04-30-2010, 10:33 AM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: how to identify high hump vs low hump?? Yes,you can cut the hump out,lay high hump over,drill through mounting hole locations,tack nuts underneath,and you`re done.This is what I`ll be doing on my rust free California cab for my`67 project.I`m using an M22 4spd (which works under a low hump) and I want a high hump for easier access to the shifter assembly.It`s a pain to mess with that stuff all up against the floor and over the transmission. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

05-02-2010, 05:54 PM	#12
1969C10shortbed Registered User Join Date: Feb 2010 Location: El Paso, TX Posts: 55	Re: how to identify high hump vs low hump?? Alright, thanks for the info! Chris



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