Shackle bushings

[79gmcsierragrande]

I’m ordering some bushings from energy suspension and I need to know what size shackle bushings and how many sets I need for my leaf springs. This is going on my 79 Sierra Grande, heavy half, SWB. The chouses are 1 3/8”, 1 ½”, and 1 ¾” eye and it says a set comes with 4 bushings, 2 sleeves, and it services 2 shackles. My best guess is I need the 1 ½” eye and I need a total of three sets.

I know I can take them apart and measure them but I’m not going to put the bushings on till I get the front end done. I’m only ordering them now because I’m ordering a $4.00 part and paying $6.99 for shipping so I figure I’ll order everything I need while I’m at it.