I have a relatively stock block that has been sitting on an engine stand for the past 5 years. I kept oil in the motor and all that. I am going to do minor work to it like a cam and replace the valve springs, injectors, headers, turbo and all the sensors, wiring and high output distributor. Do I have to worry about the rings on the pistons or anything in the block since the motor sat so long. I am also going to replace the rear main seal and check the lower block while the pan is off. Any help will do and thanks in advance!