Easy to do, no cop will tell you got an rb30 if you got a rb25 head on there. They dont know that the engine is a bit taller. Vic roads are dumb too. Like what we did we my brother engine conversion.
Me: Hi, i would like to get my engine number changed, the last motor blew up and we just did a swap
Vic roads lady: Oh alright, is it the same engine
Me: Yes ( )
*Goes and gets engine number off block*
Vic roads lady: Great can you just fill in this form and sign here
Me, Yeap no problems, Cya later