If it's the truck in your avatar, leave it alone and find a 4x4, or sell it and find a 4x4. The truck you have will travel gravel roads just fine, but you're wanting to lift it 7 inches, that is unrealistic. I know of a '68 c20 that was lifted 4 inches. For the longest time I thought it was a 4x4, it looked great, but it was worthless off road because of the suspension. They built subframes to lift the truck, great in theory as it left the suspension stock, but it made the truck worthless as it changed the dynamics of the truck. My '65 c20 was better in the same conditions. I will admit, I wanted to lift my '65 c20 before I even saw that '68, and if there was a kit available back then I would have been asking the same questions as your are. I personally am glad I left mine alone and just replaced the springs with new ones, which made a huge difference. Speaking from experience here, but it's your truck and maybe your money. If it were me, I'd leave the truck alone and spend the money more wisely.