Yeah i know what its like my bugeye was an absolute nightmare. Radiator burst (usual plastic top bit). Paid my mates mechanic to replace rad/ water pump and timing belt kit. Car never felt right and soon after had misfire cels in every cylinder 😔. Had to then pay an actual mechanic to sort the timing (i have a picture of how badly it was done somewhere, will dig it out) . Then front calipets started sticking. Exhaust fell off holes appeard in chassis ect ect could go on lol. Still loved it even though it was a wee sod ... so i bought another wrx ofcourse much to the annoance of my mrs lol.
Rebuild it mate you will thank yourself im sure everyone on here would say the same.