If the chip you are using is designed to work with an Amal valve then the
fuelling may not be correct if you force it to hold 24psi at high revs.

The Amal valve design gives the chip author the ability to control the boost
to a limited extent allowing them to reduce the boost at high revs.
An electronic controller will remove this safeguard.

Only the designer of the chip will be able to tell you this is safe. Even if the pump
and injectors can supply enough fuel for 24psi at 6000 rpm does the chip have
those load sites mapped correctly? It might not have if the author was using Amal
valve control to limit boost to 18psi for example as he would simply think that those
load sites would not be accessed.