thanks very much couldnt really ask for a better answer.
If i was to uprate the internals how much do you recon id be looking at paying and what would i need
its a slippery slope my friend.
Labour Approx £400 - £500
Rods Approx £300
Shells & gaskets Approx £150
But if the head is off you may want to upgrade the valves, springs etc and maybe get the head proted etc.
The following are reputable tuners who can do this level of tuning.
Badger 5
Jabbasport
AMD
JBS
Backdraft motor sport