Some 264s/265s had them for 79' and '80, there was no real system to it, they just added it to some of them.
Around half of the 262Cs had them, normally the ones with the all chrome grill had them, and the ones with the
chrome/black grill had rectangular lights.
The two tone 1980 242GTs had them.
Vee_Que;127752 wrote
I did upgrade the relays to suit my 740s headlight swap to the America quads and do a relay upgrade as well so I can run 100w globes.
It's worthwhile upgrading the relays and bulbs, the stock wiring/relays could hardly handle them and the light output is heaps better with good bulbs.