help please
 

Good morning
i have corvette c6 model 2009 , normal gear , i install on my engine 429 ci on ls3 block the piston set : 4.08, bore , 4.10 stroke , 1.050 , ch -7 cc volume , the crankshaft is 6 bolt 4.125 my question is what is the best head to my engine i must choose it to get maximum hours power( street race ) and , what is the best size chamber also to get max power NA ?? my cam is btr ls7 stage 4
I ask tech support for texas speed they said prc ls3 260 , any suggestions ??
greetings