Longhorn questions

[hcaz095]

What drivetrains came on the longhorns? I am seeing mostly 396/400 v8 with auto trans, but have found a few 350 auto and 350 with a 4 speed out there as well. What model trans is this? anyone know the gear ratio's? Is it a strong trans/ what size clutch 11/13 in? What is the difference in value with the different drivetrains? I would imagine the 396 auto would be the most valuable? thoughts?

What rear end ratio's came in the longhorn's? It seems most have the eaton no spin, which is a 4.11 mostly? what other options could the c20/ c30's (longhorns) come with?

Were all the auxilary tanks dealer options? the main tank is 16 gal, what are the saddle tanks usually? I've only seen the ones that fit in bed in front of the rear wheel... anything else a common tank location/ filling spot?

Thanks...

~Zach

[hcaz095]

also, what brakes did the c20 c30's come with? are they upgraded for the heavier GVW? Im going to assume there was a difference for 68-70 and the 71-72 with disc brakes etc.

Finally, what are the rough curb weights & GVW's of the chevy trucks as they progress (4x4 info not necessary)... ie

c10 swb
c10 lwb
c20
c20 longhorn
c30
c30 longhorn
c30 dually

I know there will be some variance depending on the engine/ trans/ axles, but want to know how much extra I would be hefting around with a longhorn compared to a smaller truck... Thanks again.

~Zach

[longhorn70gmc]

Originally Posted by hcaz095

Were all the auxilary tanks dealer options? the main tank is 16 gal, what are the saddle tanks usually? I've only seen the ones that fit in bed in front of the rear wheel... anything else a common tank location/ filling spot?

Thanks...

~Zach

Hi Zach,
First I would like to say that someone should be chimming in shortly to answer the rest of these.
My Saddle tanks mounted torward the front of the bed and the side access doors were mounted in the seem that makes it a longhorn. Some were cut a little further back that I have seen. Your options sheet should be in the glove box on the inside of the door. If your truck is unmolested by prior owners, you may find a build sheet under the seat in the springs or floor matting under the seat area. There mostly in the seat springs under or behind the seat. All of the Longhorns I have seen have 402 BB in them with Turbo 450 Trannies. My option sheet in the glove box does say 400. Gm did that back then for insurance purposes. The 402 engines were 396's bored at the factories. The other guys will be along soon and will either correct me or add to it. I am sure Gm installed 350 engine and trannies as well. Good Luck on the rest of your answers.

[Longhorn Man]

the longhorn was like any other truck, it could be had with or without any option that came on the C-20 and C-30. Both of mine were stock with 350/th350, and one was a 3/4 ton, the other a one ton. Gearing.... the no-spin was not all that common, and the gearing depended on the engine and tranny... both of my were 4.10 since they were 350/auto.
Here's a link to my longhorn site;
http://www.longhorntrucks.freeservers.com/

[hcaz095]

Thanks Longhorn Man for the info... I've browsed your site a few times already. From an earlier post by "GMC Jim".....

Per a 1977 issue of N.A.D.A Used Car Guide:-

1972 Ship Weight

C10 - Pickup Stepside 6/12' ..........................3560
" " FleetSide 6 1/2' ........................3630
" " Stepside 8' ..............................3640
" " Fleetside 8' ............................. 3720
C20 - " " Stepside 8' ..............................3940
" " Fleetside 8' ..............................4030
" " Longhorn 8 1/2' .........................3950

The ship weight
is defined as the shipping weight less fuel, coolant and lubricants.
weights per gallon ( lbs per gallon) fuel - 6; oil - 7; water 8.
There appears to be an error as to the Longhorn weight; should be heavier than shown...




Quite useful info, I was kind of wondering how much of a difference the c30 would be compared to the c20, as it is easy to figure out the weight differences between the c10/ c20. any GVW info out there?

[Longhorn Man]

NADA is wrong on so many things it's not even funny. The frame is taller and thicker on a longhorn, All longhorns used a one ton frame. This is obviously not right in the NADA. These trucks never seem to weigh what they were supposed to. I have had 3 1/2 trucks, and one burb, and none of them weighed what the books say they should have. Book weight and true weight are not the same.
If you need the weight of your truck for title/registration reasons, you'll probably need to run it on a scale at a truck stop... and I would empty everything I could out of it before the weigh too... just in case they tax you by the pound. That would be about the only reason they should need the weight. If they just want numbers, I'd just rattle off the book weight myself.
My one ton longhorn, with optioned HD front springs, and overloads in back, has a GVW of 9000 pounds. I don't remember what the GVW was on my old C/20, that one got killed a long time ago.

[stllookn]

1968 GM Restoration Guide Curb Weight No Rear Bumper heaviest entry, each class...
C10 SWB 3640 lb CE10734
C10 LWB 3745 lb CE10934
C20 LWB 4133 lb CE20934
C20 Longhorn 4195 lb CE21034
C30 Longhorn 4357 lb CE31034

OOOPS!!!!!! Typo on C20 LWB now fixed!!!!

[hcaz095]

Originally Posted by stllookn

1968 GM Restoration Guide Curb Weight No Rear Bumper heaviest entry, each class...
C10 SWB 3640 lb CE10734
C10 LWB 3745 lb CE10934
C20 LWB 4233 lb CE20934
C20 Longhorn 4195 lb CE21034
C30 Longhorn 4357 lb CE31034

So, we could figure that the difference between the 8ft bed and the 6'6" bed & frame is 105 lbs, so everything being the same, the longhorn 6 inch extension is only 35 extra lbs? It seems a few lbs shy, but it supports the fact that I thought it would be around 100lbs or less, but that the c10 swb is 500- 800 lbs less that a longhorn...

Does anyone know what axles were offered on a c20 / c30....most 'normal' trucks I would assume have a 3.08 - 4.11, maybe a 4.56, but the cab/ chassis could have a 5.89 or up concievably?

~Zach

[Longhorn Man]

the rear was generally a HO52 in 3/4tons, and an HO72 in one tons. In the 3/4 ton, the Dana60 was avalible.
Gearing in both was 4.56 as standard equipment, with a 4.10 optional(but came standard with certian engine/tranny combos)

[Ryan Hubbard]

My Longhorn C20 came with a 402/400 with a Dana 60 rear end with a 4.10 gear. I now have a blown 350 /400 with the Dana w/ Detroit Locker and 3.55 gear.

[stllookn]

Zach, Recheck my numbers...I just edited them due to a typo on the C20 LWB. LH over std. C20 is 62 lb. Probably mostly the frame, 6" of box sheet metal and wood, and 6" of driveline.