Using B Series Adjustable Cam Gears

You can use the smaller B Series cam gears on your B20A. You will need the cambelt from a DOHC H23A, Water pump and cambelt crank gear from a B20A5 3rd generation Prelude engine.

 

The advantage of swapping to the smaller cam gears is more aftermarket support, Buying adjustable cam gears for a B20A if way easier if they are the same as every other B Series engine. 

Heres a coupe of Photos before and after.