Newbie 340 Duster Project

it looks like they bypassed the heater core, possible leak? hope they didn't let leak to long and rust the floor and torsion bar frame rail. i know cause someone let one leak to long on a 67 coronet i bought and had to to replace floor and cross member. great find . i have 340 4spd with 391 sure grip and wish i had 2 more gears lol.