Yeah I know this is vic and the rules are different but....
The rules are straight foward.
to put say a 20 yearold motor into a current model car then the emmissions HAVE to meet the current emmisions for thet car, thats why 99% of people doing this go straight LPG, it bypasses the emmissions test.
Also if you wish to run petrol then by law you can not legally connect up the emmision units unless your quallified to do so, but it must still meet the required emmissions levels set for the car you are installing the motor into !
It isn't just exhaust emmissions either..... they also include, ....
Oil vapour emmissions from the engine rockercovers
Oil vapour emmissions from the engine crankcase
Petrol vapour emmissions from fuel tanks
Through the "reburn" setup we get rid of most of the other emmissions but they still add up into the total amount of fumes that are passed through the exhaust system ...... there is a limit on the amount of noxitious fumes that can be exhausted !
I had mine tested just before crissy.... it scraped through by a poofteenth !!!!

[color=blue][size=150][b]And your cry-baby, whinyassed opinion would be.....? [/b][/size][/color]