I'm new to the engine building and i have done some research just want personal experince. I have an ls with 85000 miles with t4 on 9lbs tuned and rev bumped to 7800. I want to build the motor this winter/spring. I just want some input in how i should build the motor rather i should just install a set of dish pistons and rings or should i also do rods and such. My goal is to bump up the psi to 12 -15 lbs. Is a block guard a good thing to install when i do the work also? Is the head good to leave alone or should i do work also like spring retainer and possibly cams. Just let me know from you experience just trying to get a feel.Thanks!