48 3600 suspension help

[dnights]

hey everyone. i am currently looking at how to redo the rear suspension but the issue i am having is i have a 3600. i like the look of the longbed so going to a S10 is out of the question and the current frame is in good shape. i also know the rear portion of the frame is different than the 3100s. so i am wondering if there are leaf spring kits that will lower a 3600 or am i stuck rebuilding the current setup or a four link. i have looked at the tci leaf spring kits but not sure if that would work on my truck plus i don't have the easiest access to call them due to where i am. any suggestions and pictures would be great.