trailing arm help

[HELLRAZR68]

i have a 68 step that has leafs on it right now and i want to put trailing arms back on, my question is are there a difference in the trailing arms on the short bed chevys from the 60s to 80s if so what trailing arms will match up. thank you guys for your time i hope you guys can help im kind of new to the hole trucking world lol

[the lights]

the trailing arms from 60-66 or 67-72 should work for you no problem. they are the same length for shortbeds and longbeds, just mounted in different positions. if you need help let me know i am pretty close to modesto.