I have a turbo kit, injectors, fuel pump, for e85, and was thinking about getting gsr cams for my 99 em1 and was wondering would the stock block hold up around like 9-10 psi or should I invest in some pistons and rods?

 

Whether stock block or built, it will last until it breaks! Can you put together a fun, stock internal B16? Sure.. *SHOULD* you? No.