All right thanks for the advice! Wasted no time and made a start on looking for rust this evening. Pulled seats, glovebox, under dash trims, carpet, sound reading out. Dash I still in, didn’t have that much time. Firewall looks perfect from the inside. Some minor spots in the floor, mostly around the accelerator pedal mount, there was some water in the sound deading foam so must have a leak somewhere which is mostly likely what caused the rust by the accelerator pedal. Only wet on drivers side and only on the door side, thinking maybe sunroof drain as it’s pretty near by.
passenger side:
drivers side:
not too bad overall from the inside. Will see what it’s like from the outside. Will most likely need to remove the dash to get the blower motor out to fix the rust near there.