looking to build either a 5.3 bored to 5.7 or 6.0 liter want to make around 450hp on motor and spray 150 need to know which wiseco pistons i need, i have a stock crank and h beam 6.100 rods and tsp 5.3 heads stage 2.5 and ls6 intake and 85mm throttle body with 40lb injectors and TSP Custom 224/224, .566"/.566" @112 lsa . newbie to ls1 engines any advise will help.

 

I wouldn't mess around with boring a 5.3 block (I am not sure you can even bore it out that far). Especially with 6.0 blocks being not overly expensive.