im looking to turbo my Ls this summer. im gettin 9:1 SRP pistons and crower steel billet rods for 500 from my boy and i think im gonna go with the drag turbo kit. im looking to run 15-18psi. ive read that blockguard prolly wont help me here. would posting my block hold that boost or would the best thing to do is sleeve it and how much would sleeving it cost. also what else will i need to run this setup safely. thanx for any help.