Hey! I own a 1982 Mazda RX7.
I run an OER 45mm Sidedraft carb on a stock port 12a engine. I have another 12a I have taken apart and I have done some Bridgeport to it so far. This 12a will be turbo'd with a blow through system, and a turbocharger off a S4 RX7.
What year is your car?
Bad picture, I have done a lot more work than can be seen, and the engine bay looks tons cleaner now than in the 7 month old picture here