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Username Post: Lowering a '72 C20        (Topic#355280)
HYPR 
"16th Year" Platinum Supporting Member
Posts: 10754
HYPR
Age: 67
Loc: Shaking and Burning!
Reg: 07-19-01
02-17-19 09:44 PM - Post#2760165    

I'm looking to lower my new to me '72 C20.
I would love some referrals for drop spindles. So far I have seen the following:
Bodykit.com HRDS17 3" drop $289.95
Brotherstrucks.com DLS8734 2.5" drop $399.99
Performanceonline.com DS 7187 2.5" drop $449.99
Does anyone have experience on any of these?

Rear leaf springs, I will likely just fabricate my own lowering blocks using solid billet aluminum blocks and source the applicable U bolts unless someone has a better idea.
Bob

http://www.cardomain.com/ride/222599
To be born a Redneck is by chance, to live as one is by choice!
Preserving the Redneck tradition one day at a time!


 
Ecklers AutoMotive
Boosted54 
"4th Year" Gold Supporting Member
Posts: 143
Boosted54
Loc: Portland, Oregon
Reg: 11-28-14
03-03-19 11:21 AM - Post#2761183    
    In response to HYPR

You are on the right track going with dropped spindles vs springs. Regarding your vendor choices I have not used any of the particular products but have ordered other parts from Brothers Truck with disappointing results.
Regarding the blocks for your rear be sure to check your pinion angle before you change anything on either end so you can make the needed adjustments after lowered.

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HYPR 
"16th Year" Platinum Supporting Member
Posts: 10754
HYPR
Age: 67
Loc: Shaking and Burning!
Reg: 07-19-01
03-03-19 01:44 PM - Post#2761193    
    In response to Boosted54

Thank you for the information. I lowered my '56 with solid blocks of Aluminum I had ordered the same way and absolutely had to change or should I say correct the pinion angle. It was (and will be) just a matter of noting the present and verifying that it is correct to begin with then as the blocks are installed inserting the correct wedge to achieve the correct angle.
Thank you,
Bob

http://www.cardomain.com/ride/222599
To be born a Redneck is by chance, to live as one is by choice!
Preserving the Redneck tradition one day at a time!


 
HYPR 
"16th Year" Platinum Supporting Member
Posts: 10754
HYPR
Age: 67
Loc: Shaking and Burning!
Reg: 07-19-01
03-17-19 12:24 PM - Post#2762307    
    In response to HYPR

Lowering the rear is going to be a bit of a challenge since it is a spring over axle lowering blocks won't work. So since I am not doing any heavy towing so I am going to start by removing the load leveling helper springs beginning with the short one which is 1" thick plus the lowering shackles (2") I will check the ride and if it is good I will try removing the second helper spring which is about .625" thick this will give me a 3.5" drop. Not as much as I would like but it is a start.

If I need to improve the rear ride I will install a set of QA-1 double adjustable shocks.

http://www.cardomain.com/ride/222599
To be born a Redneck is by chance, to live as one is by choice!
Preserving the Redneck tradition one day at a time!


 
HYPR 
"16th Year" Platinum Supporting Member
Posts: 10754
HYPR
Age: 67
Loc: Shaking and Burning!
Reg: 07-19-01
03-26-19 10:35 PM - Post#2762972    
    In response to HYPR

Well as it turns out Lowering shackles for the C20 CS simply do not exist. These trucks have a few differences than both the C10 and the C30. First of all simply taking the C10 leaf shackles and opening up the holes to accommodate the larger 9/16 bolts will not work since the bushings are the 1.5" like the C30. Now one would think well ok then just use the C30 shackles...Nope the C30 has a 2.5" wide leaf spring and the C20 has the same width spring as the C10 just larger eyelets.
Oh, in case you are thinking well just upgrade to the C30 springs...NOPE, then you will have a domino effect as follows: Cut off the C20 forward spring mounts and weld in new C30 forward spring mounts. Then grind off the rear spring hanger and weld in (yep can't bolt in since the frame is only 4.25" tall and shorter than the C30). So the solution is to either convert to a Axle over spring (most popular method) which due the axle tube diameter means you will need to "C" notch the frame for clearance or as I am going to do, remove the short helper spring, have my son (Metal Fabricator) fab up a set of lowering shackles using the C30 design to fit the C20 CS spring specs with three different ride height locations. We need to wait until the front drop spindles are back in production and availability.

http://www.cardomain.com/ride/222599
To be born a Redneck is by chance, to live as one is by choice!
Preserving the Redneck tradition one day at a time!


 
Ecklers AutoMotive
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