I inherited a GM Performance ZZZ 350 ci engine. My father had installed it in his 1966 Chevelle in 1990. Recently it was replaced with a ZZ6 after the car was restored. The ZZZ only has around 2-3k miles on it. It was only replaced due the unpopular piston slapping but otherwise ran good. I am planning on putting the motor into my 1968 Camaro that I am building. I am updating the car with modern suspension and brakes. I don’t have intentions of racing the car but I’m not going to baby it either. I am considering replacing the pistons. Is there any recommendations on what pistons to use. I’ve looked into using ZZ4 pistons but they are expensive and I’m not sure that is right approach. I’ve seen several high performance options from Summit Racing for a lot less. Im looking for any recommendations on upgrading this motor.