Dual-wheel conversion of longhorn? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 02-03-2012, 09:35 PM

I stumbled across this thread of an "inboard duallie", for lack of a more official name, and was very intrigued. Other than wheel tubs, it looks like a fairly reversible change, too.

Since I'm not very familar with HD trucks, I'm wondering if this is possible on a standard C20 longhorn (which I guess has C30 rails). Is there actually room to have completely inboard duallies like this on a truck that didn't start life that way?

I always assumed that factory dualies had to run the extra wheels outboard due to fitment, but maybe not. Not saying I'm going to run off an do this, but it's certainly cool and different!

http://67-72chevytrucks.com/vboard/s...d.php?t=307114

SCOTI · 02-03-2012, 10:49 PM

C&C trucks (cab & chassis trucks, aka flatbeds) came w/the narrower rear housings. When swapped under a standard fleetside bed, the wheel sit as they do in that pic. If a standard 'dually' rear housing is used, the wheels would stick out farther & require the dually fenders.

davepl · 02-03-2012, 11:25 PM

Thanks!

So is there anything about a conventional (non-C&C) frame that would prevent you from installing the narrower C&C rear end? I imagine you'd need the springs and everything else from the C&C truck, right?

SCOTI · 02-03-2012, 11:42 PM

Quote:

Originally Posted by davepl

Thanks!

So is there anything about a conventional (non-C&C) frame that would prevent you from installing the narrower C&C rear end? I imagine you'd need the springs and everything else from the C&C truck, right?

Nothing about the frame width prevents swapping parts.

**special-K** · 02-04-2012, 07:32 AM

Dual rear wheel cab & chassis (which is all C/30 DRWs) had the narrower axle and single rear wheel cab & chassis had the same rear as a Longhorn or any other pickup. The Longhorn frame,being the one ton frame,is the same frame as used on all C/30s dual & single rear wheel. The Longhorn is the same truck as a 133" dual rear wheel cab & chassis except it has the single wheels and a bed. All 72Freak had to do was put a Longhorn bed on a 133" cab & chassis. The only modification required was extending the wheelhouses inward because the dual wheel axle doesn't allow for the 48"(+/-) floor width that is standard on all pickups.

72freak · 02-04-2012, 08:32 AM

Just look for a narrow rear axle and mount it up. You will have to make the wheel wells..I added 4" to each one and cut the floor to match. You will no longer be able to haul any 4' wide material laying flat though. I also used wheel spacers on the front to push the wheels out as it didnt look good to me with the dually wheels way in. We tried some regular wheels also but that didnt look good either. I also added some wheel well flare at the rear and it looked fine. I have enough left over to do another rear of you need it.

no moa · 02-04-2012, 10:01 AM

I so wanted to do this to my C30, but i'm positive there aren't many Longhorn beds in Redneck Maine. lol

69C-owner · 02-05-2012, 08:15 PM

this is very interesting, I missed out on the chance to have a 67 C20 flatbed with duals from pretty much nothing but with this knowlege I can slowly gather up the truck and parts to "clone" wat I lost
Posted via Mobile Device

02-03-2012, 09:35 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Dual-wheel conversion of longhorn? I stumbled across this thread of an "inboard duallie", for lack of a more official name, and was very intrigued. Other than wheel tubs, it looks like a fairly reversible change, too. Since I'm not very familar with HD trucks, I'm wondering if this is possible on a standard C20 longhorn (which I guess has C30 rails). Is there actually room to have completely inboard duallies like this on a truck that didn't start life that way? I always assumed that factory dualies had to run the extra wheels outboard due to fitment, but maybe not. Not saying I'm going to run off an do this, but it's certainly cool and different! http://67-72chevytrucks.com/vboard/s...d.php?t=307114 Attached Images

02-03-2012, 10:49 PM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Dual-wheel conversion of longhorn? C&C trucks (cab & chassis trucks, aka flatbeds) came w/the narrower rear housings. When swapped under a standard fleetside bed, the wheel sit as they do in that pic. If a standard 'dually' rear housing is used, the wheels would stick out farther & require the dually fenders. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-03-2012, 11:25 PM	#3
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Dual-wheel conversion of longhorn? Thanks! So is there anything about a conventional (non-C&C) frame that would prevent you from installing the narrower C&C rear end? I imagine you'd need the springs and everything else from the C&C truck, right?

02-04-2012, 07:32 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Dual-wheel conversion of longhorn? Dual rear wheel cab & chassis (which is all C/30 DRWs) had the narrower axle and single rear wheel cab & chassis had the same rear as a Longhorn or any other pickup. The Longhorn frame,being the one ton frame,is the same frame as used on all C/30s dual & single rear wheel. The Longhorn is the same truck as a 133" dual rear wheel cab & chassis except it has the single wheels and a bed. All 72Freak had to do was put a Longhorn bed on a 133" cab & chassis. The only modification required was extending the wheelhouses inward because the dual wheel axle doesn't allow for the 48"(+/-) floor width that is standard on all pickups. __________________ "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 ~

02-04-2012, 08:32 AM	#6
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: Dual-wheel conversion of longhorn? Just look for a narrow rear axle and mount it up. You will have to make the wheel wells..I added 4" to each one and cut the floor to match. You will no longer be able to haul any 4' wide material laying flat though. I also used wheel spacers on the front to push the wheels out as it didnt look good to me with the dually wheels way in. We tried some regular wheels also but that didnt look good either. I also added some wheel well flare at the rear and it looked fine. I have enough left over to do another rear of you need it. __________________ 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!

02-04-2012, 10:01 AM	#7
no moa Registered User Join Date: Nov 2009 Location: maine Posts: 2,315	Re: Dual-wheel conversion of longhorn? I so wanted to do this to my C30, but i'm positive there aren't many Longhorn beds in Redneck Maine. lol __________________ 1972 C10 Deluxe.Shortbed. 402/400. A/C, white interior, needs complete restore. Project Red, white and blue. Used to be a Longbed apperently. http://67-72chevytrucks.com/vboard/s...d.php?t=451950 1971 c10 step 250 3 OTT 1969 c30 TOW-MATER. 307 4 speed, holmes 440 body. http://67-72chevytrucks.com/vboard/s...d.php?t=451082 2006 CTS-V LS2 6spd.

02-05-2012, 08:15 PM	#8
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	Re: Dual-wheel conversion of longhorn? this is very interesting, I missed out on the chance to have a 67 C20 flatbed with duals from pretty much nothing but with this knowlege I can slowly gather up the truck and parts to "clone" wat I lost Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma



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