So what would be the most rare options on it? Engine block heater? Additional coolant? Any way to find out how many units were released with X options?
No, there isn't. Chevy published production only by discrete option. Options included with other equipment were not counted. For example, only 116 Camaros were ordered with CE1 Headlight Washer. CE1 was included on each of the 37,773 Rally-Sports as standard equipment. So, not rare. Combinations of options would be complicated.
In the case of N711022, there are a few rare options. Only 2,117
M22s installed in '69 Camaros. 2,124
K05 engine block heaters. Seems surprising but a factory-installed
ZL2 hood is actually fairly rare. 10,026 sold but about 4,100 were installed on Z10s & Z11s as a mandatory option. Only about 5,926 installed as an elective option.
L78 engine production has been mis-stated for decades. The official number is 4,889 but since COPO build records list the L78 engine, it is not accurate. There were 69 ZL1s and 997 L72 COPO Camaros built so the actual L78 total is 3,823.
As for the orange interior, about 4,200 produced. 3,675 were Pace Car replicas where it was a mandatory option. Having owned two Z/28s with orange interiors, I can attest to the fact that it [and yellow] are not for everyone. Probably why they were so rare.
The doc contains some internal gibberish that would not appear on the window sticker and other docs: F62 G32 J50 J52 V48 ZK8 ZL3 ZQ7.
The ship date is not the final-assembly date. Based on other data, the car was completed on or about November 6, 1969.