Can someone enlighten me on the method on swapping injectors on a MY98 UK turbo?

I have ordered some 480cc from EJ20R (version 5 sti - I think), with yellow cap, for which I have already bought some adaptors to fit my fuel rail second hand off Scooby Net.

http://img117.ac.yahoo.co.jp/users/9...5injekutar.jpg


But I'm thinking of getting Sard 850cc for Nissan SR20. Will these fit OK onto my fuel rail? These are side feed.

http://img133.ac.yahoo.co.jp/users/9...92104_0485.jpg

Or maybe Sard 550cc, again for SR20. These were off S15 Nissan Silvia.

http://img123.ac.yahoo.co.jp/users/3...sd_550ij00.jpg

These will go with the following engine mods:

TD05 FE
Walboro 255l/h pump
FSE Adj FPR
Apexi Power FC
Apexi AVC-R
4" titanium system with TSL open neck downpipe
K&N Cone filter

Money issues aside, are 850cc too much for the spec? Are there any negative side effects to fitting injectors that are too large for the spec above? Also, do the adaptors I bought fit either of these, or do I need different adaptors?

Any advise would be appreciated.

Thanks in advance
Keigo

 

Anyone?

 

I think iirc 850cc are for car in excess of 500bhp+ with large cc's.