69 GMC suspension help

[xDiesel]

I have a 1969 GMC 3/4 ton 4x4 and I want to put all new bushings on it, like body mounts, spring/shackle bushings front and rear, etc. The problem is the only place I found with a complete chassis and suspension bushing kit doesnt make one for 4x4 trucks of this year. It would be fine to go with the 2wd kit but the bushings I need most are the front leaf spring and shackle bushings, because not having them has caused my truck to shake pretty violently at 25-30 mph. I was wondering if anyone knows a place where I could get a kit like that or if a kit from a 73-up 4x4 would work, like if the bushings are pretty close to the same. Any help would be great. Thanks