Te51 suspension upgrade questions??

[Te51sr5]

So I'm rebuilding my Te51 liftback from the good up and upgrading things that are needed. My question is while I'm in it what are some good upgrades over stock I could do?? Also I want to do a combination of energy suspension and aluminum bushings, any other years of Toyota's I can use to piece together all I need to upgrade it. I have already done the ae86 brake front brake conversion.