FYI I use to build Nikki carbs for a NASA road racing class called Pro7 for many years. I did it for myself and my customers. I stopped doing 79-80 carbs that are different because they were problematic, Mostly vacuum leaks and rough idle. I learned from Paul Yaw and he learned from me. ;p
I'm a retired road racing Mazda Only RX7 & Miata race, repair and restoration shop owner.
My old out of date web site is mazdamanor.com.
In the last week I stripped a Pro7 RX7 and a Lucky Dog winning 1st gen RX7.
Need high performance suspension parts.