Looking for some ideas here...

Whilst I have the engine out of the car I want to overhaul all the usual bits but wouldn't mind throwing a few upgrades at it too...

I have bought a supersprint manifold which I am led to believe is a decent upgrade over the standard manifold, what else is worth doing ?

- Cams, if so which ones would be best to go for ?
- Injectors, is it worth installing uprated ones ?
- Is it worth installing an F7R head on the F7P bottom end or a waste of time ?

I see the ECU has a "FENIX3A" chipped installed in it, is there any way to tell what "firmware" has been installed on this ?

Any input greatly appreciated !

P.