Yo people need some help answerin a silly question; to my understanding the two bolt up together with the use of GSR head bolts although I'd probably use ARPs but is there anything else necessary to swap the block into my 99 Si?? Need some torque along with the added displacement....I also currently have an Aem cold air & an Apexi N1 full catback exhaust; will I need to modify either of these for the swap to work?? Any knowledge dropped on this will be greatly appreciated cuz I may have a 96 GSR block at my disposal soon.........