There is a limmit (or at least there was, I'm not sure if it still is in 8i), but you'll never be able to get the actual value for this limit, either in number of lines of code or in bytes of source. It is some kind of soft limit. When oracle parses PL/SQL package, it breakes the code in "nodes" (I belive this was the expression used in the article I've read about this), and there is a limit on the number of this "nodes" that parser can handle. Different PL/SQL constructs create differend number of "nodes", so you can't realy determined this limmit, but if I remember correctly in 7.3 the limit was somewhere around 120 KB of parsed size, but was raised significantly in 8.0.

Your only option is to break this large package into two (or more) smaller packages.