[Charon]

I never keep the stock spring setup in a 60-66 K truck. I have done 11 conversions over the last 28 years. 4 for myself and 7 for customers. I use 69-72 front mounts. Moved forward one inch. I leave the rear shackle mount and bore it out for poly bushings. Then I use 73-91 four inch lift springs. I also always do the rear. I use 73-91 4x4 mounts. And earlier i used the 56 inch springs. But the last few I have used the 62 inch gmt 400 series springs. This eliminates the tall lift block. If you have any traction device in the rear with some. Sticky tires. The wheel hop with the blocks and stock shock geometry will make understand that upgrade.