Well it's time to pull the engine. Gonna fix up my dad's car to make room in the shop and then the fun can begin. For those curious, the highest compression I saw out of either rotor was ~5psi so something is REALLY wrong. As far as the direction of this project, I think for now I'm just going to do a light restoration with extremely light mods (put together interior, retouch the paint, new head unit/speakers, rebuild/replace engine as necessary, new tires/wheels, lower her a little bit).