I am removing the upper and lower oil pans (RX330). What do I need to do to remove the upper oil pan as I am having trouble breaking the seal ?

 

You can remove both oil pans and sump on the larger 3.5L (RX350) with engine in car, so I suspect you can with the 3.3L too, but someone who has it will need to chime in...

 

I believe you can on the RX330 too.
Lower oil pan comes off easy and I believe upper oil pan will too without pulling the crankshaft gear w/ timing belt but don't quote me.

Strongly suggest not swapping any engine into out cars from other models unless you can confirm fitment first or gluton for punishment.

Sometimes things like power steering and other stuff bolts up different leaving people to drill and tap bolt holes in the block and that makes me cringe a little thinking about it.