Just got more info on this:
J600709 - completed 21/12/99 (Wednesday before Xmas break on Friday).
Betsbac code of 34702J1:
3 - 8H77 or 8C77.
4 - L15 or L16 (same for UC but Starfire becomes A for L18 and LY1).
7 - M40.
0 - Conventional steering.
2 - Front discs.
J - This is a UC code for 3.90:1 non-LSD baby Sals.
1 - No A/C.
Warranty commenced 12/77.
Big thing - dealer code 252. This is Company Dandenong. This must have been a durability/reliability car for the Starfire. Gets run for so many kM and then tendered off.
As part of this I just discovered an engine I didn't know about - LY1 - low comp Starfire.