1969 gmc

[smokeater05]

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.