Advance retard or power jet?

I've had my engine together for a number of years,
I spent a lot of time with different pipes and jetting to get the ride I want.
The motor itself is fine the only issue I have is at WOT I get an upwards creep in both cht and egt.
I get round this by rolling throttle on and off.
I could upjet the main at the risk of losing some mid throttle response.
What would either pjet or adv retard give me.
Ta
I spent a lot of time with different pipes and jetting to get the ride I want.
The motor itself is fine the only issue I have is at WOT I get an upwards creep in both cht and egt.
I get round this by rolling throttle on and off.
I could upjet the main at the risk of losing some mid throttle response.
What would either pjet or adv retard give me.
Ta