[Ctech5440]

I own an 89 B2600i, I want to go away from Fuel injection, I would need an intake and a cylinder head, I want to keep my block etc. if possible any suggestions?

 

[Axel Breaker Earl]

The G6 Mazda engine only came as fuel injected, I'm pretty sure.......so finding an intake that is made for a carb is going to be impossible. The cylinder head wouldn't need to be changed......and again, the only cylinder head that will bolt up, is the G6 cylinder head.
If you want a carbed engine, it may be easier and quicker to swap the engine (and trans) to a carbed model.

In 1987 & 1988, the Mazda B2600 (no "i") used a Mitsubishi 2.6 liter engine that was carbed......but, the intake and exhaust were on the opposite sides of the cylinder head, compared to your B2600i Mazda G6 engine.