Like Brooke I too run a 1984 Mazda Rx7 and as for my engine reliability I can't complain at all! I've run two and a half racing seasons on this motor and it has been bulletproof. Last year alone I entered every single race possible (4 race weekends in Calgary, (including all King of the Road mini Enduros and the Big Adventure Race), 1 race weekend at Namao in Edmonton, 1 race weekend at Gimil, the NASCC Invitational race at the Grand Prix, plus several test and tunes... Basically "my" experience with the 12A rotary has been a positive one, and like Brooke said CC's have done very well in overall championships and point accumulation if that is your thing.
Heck you could buy the CC for sale on this site and be race ready in no time!
-M
