Your maths is almost correct, 1200x1.15=1380, so 1400 is just over the 15%, though I couldn't say if they will let is threw because its so close and still an a series, best bet is to call RTA Technical Enquiries on 1300 137 302 and talk to them before going for the blue slip.

If you have to go to an engineer he will check that the car complies with the relevant ADR's and as long as its generally stock he should have no problem in signing it of.

I'm not sure what Tyrie has been told about the cross member, though cant understand why this would be any indication of it passing as its just a structural part and would just have to meet the structural requirements (that is just my assumptions and could be wrong).

To Tyries Question. No it was registered in QLD with the A14 in it. Just ran out 3months ago Need a Bluey anyway for NSW rego. As your probably aware.

To the best of my knowlege A14 / A15 conversion is fine with out an engineeres. You should have no problems.
How does the coupe go that was a great buy!

does it still have the a12 on the rego papers?

Thanks mate i bought the coupe with an A14 in it. So hopefully he put a ute cross member in it. Not to fussed i got a great deal will pay for an engineers cert if need be.
Pretty sure your allowed a 15% increase which i think means 1398cc but im no maths genius. So want to be sure.

my 1200 wagon is registered in NSW with an a14 and no engineer's.

It should still qualify as an owner certified modification, as long as you use a late ute crossmember I believe.

Hi peoples. Does anyone know for certain if an A14 has to be engineered in a 1200 Coupe in NSW ? Thanks.
P.S Please only want certain answers i already have thought of the maybes and what ifs.