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11-29-2010, 04:57 PM
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#1 |
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Registered User
Join Date: Nov 2010
Location: Williamson, Ga
Posts: 42
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1969 gmc
I have a 69 GMC Custom c10. It has six lug wheels, gauge package, interrior light, and aftermarket A/C. I bought the truck almost nine years ago for $1800and I am just now getting back to working on the truck, two kids later and a college degree. I am going to convert my truck to 3/4 ton by using a 73 c20 I found for $700, the truck is complete. My question is will I need to use 3/4 ton springs from 67-72 trucks or from the 73 truck when I put the 14 bolt in? The truck has leaf springs now with a 12 bolt. I know the front subframe will work, just have to drill two holes and slot it. Thanks for any input and thanks for a great website. I have learned alot in the last few weeks by going through the threads on this site. I will try and post some pictures later. My plans are to convert and rebuilt the c20 suspension, paint frame, 69 camaro gas tank, repair cab corners and bodywork, powertrain, duplicolor paint myself, and do the rest while I drive it.
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11-29-2010, 10:01 PM
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#2 |
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Registered User
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,982
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Re: 1969 gmc
Not to start an argument, but are you sure you want a 3/4 ton? If you're planning on towing or carrying heavy loads, that would be a good idea, but the ride is definitely harsher than the 1/2 ton. I sold a 1/2 ton and bought a 3/4 and I didn't like it nearly as much.
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11-29-2010, 10:22 PM
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#3 |
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Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: 1969 gmc
The spacing of the leaves is different so you will have to move the perches. Also the 73 has 2.5" wide leaves while the 69 has 2.25" wide leaves. Easiest thing to do would be to get some perches and weld them to the new rear to fit your stock springs. If you are upgrading to 3/4 ton then I'm guessing you are gonna haul with it, if so you could upgrade your leaves to handle the load by getting some helper airbags. Hope this helps get you on the right track.
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68 3/4 ton  (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged  build thread41 3/4 ton (wife's)-flatbed, fully restored to original01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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11-29-2010, 10:45 PM
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#4 |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: 1969 gmc
As far as springs...C10's with BB's uses the same spring as 3/4 ton trucks. At least that is my understanding.
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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11-30-2010, 08:56 AM
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#5 |
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Registered User
Join Date: Nov 2010
Location: Williamson, Ga
Posts: 42
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Re: 1969 gmc
Thank you for the information. I plan on towing my 85 4runner to the trails and haul some wood. Would my setup be able to tow a light truck, w/ the 12 bolt and leaf springs? If this would work then I will do some more searching on disc brake swaps. The other reason I was going for the swap was so I could have disc brakes. I have 72 spindles, but I would like to keep the six lug pattern if I stay with my set up. Thank you once again for the help.
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