injector sizing

[mwc at lubrizol.com]

Hi.  I'm new to the EFI list.  Excuse me if these questions
are exhausted:

I have a '84 928S with L-Jetronic.  I'm interested in increasing
performance, but my budget will allow only one step at a time.

Before I add a hot cam, can I oversize my injectors without
any negative effects?  I think stock is 19 lb/hr, and I'd like
25 - 30 lb/hr.  I would think that open-loop mode would run
too rich; if I'm right, can it be adjusted on L-Jet?

Where can I find / buy new Bosch injectors at a good price?

Do all Bosch injectors have the same physical dimensions, so 
that I just need to determine supply?

Much appreciated,

Matt Carpenter
E-mail: mwc at lubrizol.com