I dought it but I had the pick up fall out of the pump on a 350 once brand new motor w/ 20psi and a clanking sound.
Did the car sit a while befor you bought it????I had a friend who bought a caddy w/ a brand new 425 car sat,carb leaked into the oil.He bought it fired it reved it like a prostock and drove it home w/ gas in the oil. That car died within weeks.
Your best bet would be to pull the pan.A pickup prob would be there.If that ain't it plastigauge the bearings.More than likely the 50wt oil and pump rebuild tell me he pawned it off.