Dizziness + Burning eyes while driving. HELP

My 93 Civic hatch GSR swap I just bought last month has been giving me dizziness and burning eyes while driving long distance.
I have to roll the windows down to minimize this dizziness and burning eyes.
I was wondering if anyone has experienced this at all with ANY vehicle they have owned.
Some things that Ive noticed:
The previous owner recently replaced the catalytic converter. When the engine is hot, i can hear the cat "ticking", once every 7 seconds or so. Its loud.
The previous owner had an Amp wire from the battery through the firewall and found that a rubber grommet was missing. I plan on plugging that hole with a grommet and silicone.
I dont know where else to look other than maybe the shift boot area or rear hatch seals??
The car also has an unusual smell inside the interior. I cant describe it but I can recall the older Ford's (70s,80s) had that same smell. As if just the interior being so old and worn, giving off this unusual smell.
I vacuumed the interior, steamed clean the interior, dusted/armoralled the interior and used febreeze. It helped but its still there.
Any ideas?
I have to roll the windows down to minimize this dizziness and burning eyes.
I was wondering if anyone has experienced this at all with ANY vehicle they have owned.
Some things that Ive noticed:
The previous owner recently replaced the catalytic converter. When the engine is hot, i can hear the cat "ticking", once every 7 seconds or so. Its loud.
The previous owner had an Amp wire from the battery through the firewall and found that a rubber grommet was missing. I plan on plugging that hole with a grommet and silicone.
I dont know where else to look other than maybe the shift boot area or rear hatch seals??
The car also has an unusual smell inside the interior. I cant describe it but I can recall the older Ford's (70s,80s) had that same smell. As if just the interior being so old and worn, giving off this unusual smell.
I vacuumed the interior, steamed clean the interior, dusted/armoralled the interior and used febreeze. It helped but its still there.
Any ideas?