GM did not keep records of option combinations, but if you use the percentages of the different options you can get a VERY rough estimate of cars produced with certain major options.
There were 3675 Z11's produced between both the LA and Norwood Plant.
In 69 there were 13659 big blocks produced out of 243,085 cars which is 5.62 percent of all cars.
Applying this to the 3675 total Z11's equals 206 big blocks.
there were 3692 TH-400 transmissions used in 69 which leaves roughly 10000 big blocks with 4 speeds. 13659-3692 = 9967 4 speed big block combos. This means 72.9 percent of all big blocks had a 4 speed.
In this example it means 72.9 percent of the 206 big block Z11's had a 4 speed which equals 150 cars.
206 big block Z11
150 Z11 big block/4spd
56 Z11 Big block/ TH-400
Small blocks are split almost evenly with 4 speeds (48%)and TH-350s (52%), and are harder to estimate because there are Z11's with PG's and 3 speed manual transmissions, which we will ignore for this purpose
3469 small block Z11's
1665 Z11 small block/4speed
1804 Z11 small block Auto trans
This is just an estimate of course your mileage may vary. Hopefully we won't see this qouted as official production numbers in the future, casue they aren't.
1969 Indy Pace Car
350/300HP RPO Z11
My 69 L48 - 350/300HP Engine