RB25DET vs RB30DET ?

[Steve]

Hi Sydneykid, I am planning on using an RB25DE head and getting a manifold made. Is the sump off the RB25 better than the RB30? Anything else that needs looking at? Perhaps if I just buy a tired RB25DE, would solve alot of probs in one go.

Perhaps I could put the 3L engine # on the RB25DET when I sell it?

Thanks for your help.

Steve