The Factory listed the 3 Speed as standard on a lot of cars back in the day but few ever got them.
The later cars 73-74 Charger/Challenger Rallyes, Cuda & Road Runners were 318's and the 340 and up engines were an option. I couldn't find the ads to back up all of them coming with 3 speed but here are the ads fr the 70 R/T and the 73 RR listing them as 3 Speed standard.
All these ads list the 3 speed as standard, there are more if you look.
http://www.dannyk.net/1973roadrunner/images/73rr-ad-1200-01.jpghttps://cartype.com/pics/7916/full/dodge_challenger_rt_ad_70.jpghttps://www.hamtramck-historical.com/images/vintage-advertising/73challenger008.jpgI have seen a lot of 73/74 318 Rallyes, Cuda's and RR's (more than 340 & Up cars) but I don't recall ever seeing a 3 Speed manual car in the sport models.
It's like my red 73 Hardtop Rallye Challenger. I have only seen one other red 72/73/74 challenger without the vinyl top. They are out there but I haven't seen them.
