4 chambers is actually the ideal. Gives more airflow and obviously more power.But, cost too much.I am thinking of a cheap way and with stuff I already have.

I have heard (don't know how true) that using weber sidedrafts or Dellortos, you remove all their interior parts, put injectors on the intake manifold and a throttle position sensor on the throttle shaft and then you have 4 throttle body fuel injection.