Looking to add some more power
 

1996 GT current set up is fully forged 4.6 20 over, P.I heads (stock), 42lbs/hr injectors, procharger D-1SC about 14lbs boost, stock throttle body, procharger red race valve, shorty headers, hi flow cats, offroad x pipe, MAC catback along with some other things. Thinking of doing a head upgrade, blower cams, Snow stage 2 kit. Any thoughts on best head and cam set up?

I have been seeing ads for a throttle body for my 2009 GT, but am wondering,
'What is the size of the standard one on my V8, 4.6, 3valve?" Will a new one make that much difference?