i'm gona start building my d16 soon and need to start ordering parts. i am gona go all motor and a 100 or 150 shoot of nitrous for the track. i'm planing on getting the blocked re-sleeved and installing a block guard. i'm cheap so i'm just gona get some ls rods and have them shot peend. but i'm not shure about pistons, i was just gona get some zc pistons (again, because i'm cheap) but i wanna run a bigger shot of nitrous now so i think i need better pistons. i'm also wondering if i should upgrade my O rings and barings. do you think this needed or are the stock ones ok? so this is what i need to know: 1) what sleevs should i get, how hard are they to install, and what is a good price? 2) what pistons should i get, will they work with the ls rods, and what do they cost? 3) do i need to upgrade my O rings and barings? oh, and do i need a block guard or do i evan need to sleeve the block for nitrous? or do i just need to upgrade the pistons and rods?(but remember, i'm a cheap bastard) Thanks in advance.