i getting to get my block machined and all i need is pistons and rings. It is a 6.0 block and will be around .040 over. Im going to spray a 400hit and that will be through 2 or 3 stages. Should i order custom pistons from dimond, or does someone offer and off the shelf piston that will work, and hold up with the amount of nitrous i will be spraying. Thanks Joe