Door Glass Felts

I'd check lower rear front fenders, Inner fender wells upper rear, lower quarter panels, rockers, front and rear windshield frames ,and torsion bar cross member for any rot start with. JMO
Me personally would look for a clean bodied slant six car (Cheaper) like that 69 posted above and convert to V8 so I know what I have and want for a drive train. Obviously your call. Just don't buy anything without seeing it in person. Again JMO