I'm kind of inexperienced when it comes to the 420a. I've done some research on these motors and have read a lot about how the oem stock rods are mainly the weakest part of the 420a's. Which is the reason why high boost levels can not be acheived on the stock internals. My question is if the rods are replaced with say eagle forged rods with the stock 9.6:1 compression pistons about how much boost can be attained in this type of set up safely? If someone could give me some sort of insite into this it would be appreciated, thank you.