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Old 02-13-2010, 12:14 AM   #1
1moretoy
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how low can i go?

i have a 70 short fleet wood bed with a cpp c-notch, and wanted to know if it would be worth the work raising the floor to get full use of the notch. how low can i go without raising the floor. anyone have pics with bags, c-notch, 20's and stock height floor. thank you
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Old 02-13-2010, 07:36 PM   #2
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Re: how low can i go?

ttt
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Old 02-13-2010, 07:38 PM   #3
wancosc356
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Re: how low can i go?

Might try using the search function. I believe this question has been asked numerous times.
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Old 02-13-2010, 09:09 PM   #4
lolife99
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Re: how low can i go?

I'm at 5.5"/7.5" static drop on my '69 swb.
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Old 02-13-2010, 10:33 PM   #5
1971gmcshortbed
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Re: how low can i go?

How did you get that static lolife? That is exactly where I want to be, I have a 71 1/2 ton with 3" spindle, 1" spring, 4" leaf and 1.5" shackle, (disassembled). I may need to re-do this thing.
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Old 02-13-2010, 10:46 PM   #6
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Re: how low can i go?

Quote:
Originally Posted by 1971gmcshortbed View Post
How did you get that static lolife? That is exactly where I want to be, I have a 71 1/2 ton with 3" spindle, 1" spring, 4" leaf and 1.5" shackle, (disassembled). I may need to re-do this thing.
Here's the build thread:

http://67-72chevytrucks.com/vboard/s...hlight=no-life

And the suspension is made up of:

'71-72 drop spindles
3" springs (front)
6" springs (rear)
1.5" lowering blocks
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Old 02-13-2010, 10:49 PM   #7
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Re: how low can i go?

Quote:
Originally Posted by 1moretoy View Post
i have a 70 short fleet wood bed with a cpp c-notch, and wanted to know if it would be worth the work raising the floor to get full use of the notch. how low can i go without raising the floor. anyone have pics with bags, c-notch, 20's and stock height floor. thank you
IMO... bags will be as low as you can go with only a standard notch in the frame. As far as how 'low' that will be, that will depend on the wheel/tire specs.

If you only go with a static drop, a 4.5/6" drop will be as low as I would go in order to run 20's; unless the specs were spot on and accounted for turning radius and suspension travel, you might be able to go a tad lower, but not without notching the rear as you have done.

For the specs you mentioned above, any standard bag system will allow you to lower the truck as far as possible without major modification.
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1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6)
1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior)
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Old 02-14-2010, 12:02 AM   #8
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Re: how low can i go?

Quote:
Originally Posted by 1971gmcshortbed View Post
How did you get that static lolife? That is exactly where I want to be, I have a 71 1/2 ton with 3" spindle, 1" spring, 4" leaf and 1.5" shackle, (disassembled). I may need to re-do this thing.
Mine is a coil spring rear truck.
front:
2.5 spindle
3" drop spring
rear:
6" drop spring
1.5" lowering block

You might need stock rear leaf springs and a flip kit to get the back this low.
(and maybe a lowering block)
You can always trim your front coil springs to lower the front a little more.
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Old 02-14-2010, 09:32 AM   #9
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Re: how low can i go?

Heres mine. Bagged with a bolt on CPP notch on 15" rallies. Stock bed floor.

DZL1.
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Old 02-14-2010, 12:20 PM   #10
1moretoy
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Re: how low can i go?

dzl1 are you maxed out on the notch or do you have a bigger bump stop so you dont hit the bed floor

Last edited by 1moretoy; 02-14-2010 at 12:20 PM.
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Old 02-14-2010, 12:46 PM   #11
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Re: how low can i go?

You would need bags and 2" blocks to have to utilize the whole notch. You would also have to cut out a small section of the cross member above the differential because the nose of the diff will hit it, and then you'll only gain an inch. This requires raising the floor. If I had to do it again I wouldn't. If I were going to do this much work you might as well try to lay frame. This is my experience with the weld in arch notches.
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Old 02-14-2010, 01:13 PM   #12
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Re: how low can i go?

ok bagged with a 2 1/2" c notch and cupped LCA
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Old 02-14-2010, 01:21 PM   #13
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Re: how low can i go?

heres mine - bagged with 3" spindles, cut bottom cups down with upper plates, 2" blocks, 2 1/2" c-notch, stock floor with stock inner fenders front and rear
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Old 02-14-2010, 01:39 PM   #14
Ackattack
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Re: how low can i go?

This is about as low as you can go, the pumpkin is within about 1/8" from the bed floor when it's sitting on the airbag bumpstops. I also have some block too.

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Old 02-14-2010, 04:22 PM   #15
1971gmcshortbed
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Re: how low can i go?

Lots of good info here, and some very sweet trucks, I do have more questions. With only a cpp notch (no dropmember) what will hit first? Pumpkin on bed, driveshaft on crossmember or axle on notch? Given that there are no bumpstops. Some one should know this...
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Old 02-14-2010, 04:55 PM   #16
lolife99
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Re: how low can i go?

With a 2" block,... I would say "pumpkin hits the floor".
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Old 02-14-2010, 05:02 PM   #17
avysittinon22s
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Re: how low can i go?

mine was either the floor or the crossmember
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Old 02-14-2010, 05:53 PM   #18
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Re: how low can i go?

Quote:
Originally Posted by 1moretoy View Post
dzl1 are you maxed out on the notch or do you have a bigger bump stop so you dont hit the bed floor
I have the bump stops that come with the cpp notch kit. My pumpkin comes close but doesnt hit the bed.

DZL1.
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Old 02-14-2010, 07:26 PM   #19
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Re: how low can i go?

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ok bagged with a 2 1/2" c notch and cupped LCA
bump stops ?? what are those..My lca hits my x memeber at full dump and the rear axle bottoms out on the c notch and the pumpkin is so close that with my old bed ( junk floor) if you bounced on the floor you could feel it hit.....both are ok as long as you go slow ( like in a smooth parking lot) but about 2" of clearance is all I ever have to the stops..keep in mind also that you have to drive your truck that low or you'll hit very thing and if your running long headers they take it hardest..
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Old 02-14-2010, 09:51 PM   #20
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Re: how low can i go?

crazy question i know but what does static mean?
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Old 02-14-2010, 11:06 PM   #21
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Re: how low can i go?

static is a drop with regular coil or leaf springs - i.e. non adjustable.
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