Leaf Spring Bushing Sleeve Length

[CJM72]

Getting ready to install Tuff Country EZ ride front leaf springs on my 1972 K5 Blazer. It came with poly bushings and sleeves for the springs and I ordered a set of the thinner shackle bushings from Energy Suspension. Looking at the parts I noticed that the Energy bushing sleeves are around 3.5" long and the bushing sleeves from Tuff Country are 3.7". Is there a proper length for these? Should I cut down the longer sleeves to match the 3.5" long versions? I don't want the shackles to be splayed out or uneven bushing wear. How tight should the sleeve be on the front hanger? Thanks!