If you have a programmable fuel computer, then you have all the control over fuel delivery you need. An adjustable regulator is way down the list of things you need.

A standard 2wd Cossie has hosetail fittings and is adjustable, But you DO NOT need an adjustable regulator.

Are you saying you have no efi parts whatsoever ? No injectors, fuel rails, etc etc ?

the standard regulator fitted to your engine/rails will be all you need.