are you still using the pickup that came with the engine?
the pickup and pan need to be matched
a truck has a rear sump pan and pickup
a car has a center sump pan and pickup
and a van has a front sump pan and pickup
the oilpump interchanges, as long as you make sure you get the right pickup
(just read your using one from a 318)
how does it interfere?
does it hit the bottom of the pan square on?
any chance it just got cockeyed?
as long as it is a center sump pickup on there (and your pan is centersump too, correct?)
it should fit just fine
got any pics?