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#1 |
Registered User
Join Date: Apr 2019
Location: Forney, Texas
Posts: 25
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67 C10. 3/5 drop question
My Truck has a CPP 3/5 spring drop. Next, I want to do the 2.5 drop spindles with the disc conversion. My question is will I need to change the. Rear springs to make the truck level?
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67 C10 Step Side Upgrades: American wiring, CPP Tubular Control arms CPP Sway ,CPP Pan hard Bar Cowl Hood, Rear mounted Fuel Power Steering, Classic Dash |
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#2 |
Registered User
Join Date: Mar 2020
Location: Portland, OR
Posts: 335
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Re: 67 C10. 3/5 drop question
There are a lot of variables here, to say what you need for certain. However, you likely won't need to replace the springs. You could do an axle drop to level it out, just figure out how much you need and buy it. When you get to 7" of drop, there isn't much travel left, FYI.
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#3 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,721
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Re: 67 C10. 3/5 drop question
On a coil spring truck it’s easier to get a little more drop using blocks. That’s what I would do. My leaf truck is dropped 4.5” in front and 7” in the rear with no C-notch. Once you do the front, decide how much lower you want to go in the rear and just buy the appropriate block.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#4 |
Registered User
Join Date: Apr 2019
Location: Forney, Texas
Posts: 25
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Re: 67 C10. 3/5 drop question
Thank you guys for the helpful info!!
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67 C10 Step Side Upgrades: American wiring, CPP Tubular Control arms CPP Sway ,CPP Pan hard Bar Cowl Hood, Rear mounted Fuel Power Steering, Classic Dash |
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#5 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,983
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Re: 67 C10. 3/5 drop question
Good suggestions.
I'll add, drop blocks are an easy way to get additional drop. But there are consequences if getting aggressive. Drop blocks beyond 1" in height can put the rear axle scrub-line below the wheel lip if using 15" wheels. In the event of a serious tire failure, the U-bolt ends can make contact w/the road surface. Like dropping an anchor, it's not a big deal if moving unless it catches something or digs in. Wheels w/a larger diameter change the scrub-line dimension offering more wiggle room for a taller block w/o the possible contact concern. This is just something to be fully aware of when it comes to different lowering methods.
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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. |
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#6 | |
Registered User
Join Date: Apr 2019
Location: Forney, Texas
Posts: 25
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Re: 67 C10. 3/5 drop question
Quote:
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67 C10 Step Side Upgrades: American wiring, CPP Tubular Control arms CPP Sway ,CPP Pan hard Bar Cowl Hood, Rear mounted Fuel Power Steering, Classic Dash |
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#7 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: 67 C10. 3/5 drop question
Is it level with the current 3/5 drop?
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72 C10 lwb fleetside -stock 350/350 combo |
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#8 |
Registered User
Join Date: Apr 2019
Location: Forney, Texas
Posts: 25
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Re: 67 C10. 3/5 drop question
Good question, I need to measure but Also I was waiting for the front end to settle. It doesn't have 20 miles on it since I did the front end.
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67 C10 Step Side Upgrades: American wiring, CPP Tubular Control arms CPP Sway ,CPP Pan hard Bar Cowl Hood, Rear mounted Fuel Power Steering, Classic Dash |
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#9 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,983
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Re: 67 C10. 3/5 drop question
Yes (when using lowering blocks =/>2").
If a 15" tire goes flat but stays on the wheel w/1.5" blocks, it will still roll depending on the thread extended after the nut under the arm that secures the axle tube. It will also likely make some contact & damage the threads @ the end. Beyond that 1.5", those U-bolt ends are making contact. Larger diameter wheels simply increase the scrub-line dimension allowing use of taller blocks w/o issue.
__________________
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. |
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