suspension help needed

[doug70]

I posted this in the suspension section a while back but there was no response, so I will try here.

I put 56" rear springs on my 71 k20. Well half way, I have the front mounted and the diff back under, but the rears are still loose. I am considering a shackle flip. I have some front spring hangers from the donor truck. I don't have any load so I don't know exactly where to mount the hangers. Info needed here. I was planning to mount the rear hanger with the 56" distance center hole to center hole.

The second thing is that i want to use my old 52"s for the front. I have found posts of this on toyota's, but not here. Has anyone done this? When I measured things our, it looks like I move the rear mount right next to the cab mount, maybe even trim a little from the mount. Remove the 2 rivets holding the front mount to the rad support and build a new mount for that. What do you think?

Doug