D16y8 only ever came in the coupe VTI (EK8) - the sedan VTI got the D16y5 and the average gearbox

early GLI did have drums in the back and as far as i know ABS was an option on all models from the EK up

the D16y1 / D16z6 is from the EG VTI

sounds like the car was in an accident and patched up by a wrecker lol