Look to see if you have a leaky valve cover gasket near the inlet for number 2 cylinder.
I have read of oil leaking from the valve cover then getting sucked into the inlet port.
I think the guy replaced the engine before he discovered this... and he could have fixed it with just a couple of new gaskets if had spotted it.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.