Trying to find out if 79-newer Toyota Pick rear leaf springs may fit my 1975 Toyota pick up??

All that are available are from 79 and newer Toyota pick ups.

My truck is a 1975 2wd SR5 long bed. I lowered my truck in the rear with tapered blocks. After installation I noticed the right rear tire is a bit more positioned forward than the left rear tire. Upon inspection I noticed the left leaf spring assembly is missing a leaf spring and has a different short leaf pack than the other side.