1990 964 c4
 

looking to make this my first porsche......77k.....asking 25k OBO.....wlll probably offer 21konlyif PPI shows nothing.......cosmetically looks fine....current owner (3rd) says previous owner had engine pulled at 67k and did everything that needs to be done..valves and clutch..only problem, no documentation. Kinda concerns me....... drives fine, sounds fine, cold start no smoke. Current owner has all records since his purchase in 2000...nothing but routine oil changes.

What should I be looking for? any advice for specifics to be looked at during PPI......any words of wisdom please.
Without documentation, I'm wondering.