Hi Greg, Thanks for that...interesting. The RS30 was produced up to June 1978, as I own one! We in the UK did not get compliance stamps, but the build date of mine is confirmed by the kanji dates on parts. And yes, Australia did not get any 1978 production RS30's. It is interesting that the compliance date when it reached Aus. compared to its rough production date. I know these are not "cast in stone" and Nissan was not precise on chassis number records, as discussed on other posts on here. I presume the compliance stamps were put on at the port or at rego? Yours 1974 RS30-000946 with a compliance date of August 1974 1975 RS30-005055 with a compliance date of February 1975 1976 RS30-010275 with a compliance date of August 1976 1977 RS30-015130 with a compliance date of June 1977 Nissan production, data from Nissan's 1979 parts microfiche for the HS30 and RS30. Aug '73 - Aug '74 000001 - 005000 (date and chassis nos.) Sept '74 - Jul '75 005001 - 010000 Aug '75 - Jul '76 001001 - 015000 Aug '76 - Aug '77 015001 - 021000 Sep '77 - Jun '78 021000 - 021384 As you look at your 1974 car, it would roughly, roughly, built in say, Oct/Nov/Dec. using the corresponding production dates, whilst the compliance date is approx. 8 odd months later. This is like this for the others too. All interesting (well I find interesting!). For me, what we call the late 260z, which is the Sept '77 on is what I really want to understand and whether Aus. got any of the "late" cars (this is why I asked you for your info). Not saying this is accurate (as the microfiche data is all I have to on), but months between built and compliance dates does point to that compliance dates are not a way date a cars build. Thanks again Greg