Help! Wanna get a little info on trick flow heads and what i should expect from them.

[Bluegt98]

Alright I have a 98 mustang gt I plan on doing trick flow 44cc heads with stage 3 comp cam, 24 lb injectors, adjustable cam gears,ford performance rocker arms, victory Jr intake manifold, 78mm bbk tb. A lot more things but just basically a fully build motor that’s stroked and bored. My question is what would be the best bore for it and would stroking it to a 5.0 be good enough? I don’t want this car super fast but looking to reach 600hp with boost. I feel since I’m boosting I should go with the 5.3 cast iron but just don’t know for sure and wanna get more knowledge. Thanks!!!