Successful LS1 swaps are far and few in Pakistan as the motor itself is expensive and the wiring and tuning expertise extremely limited. However, there have been plenty of well executed JZ swaps in RX8s with working instrumentation. The car will lose its famed 50/50 weight balance though. It will be closer to 60/40. Bump steer is an issue with JZ swaps and steering rack relocation is often required to correct this, but it's by no means a show stopper. RX8s tend to feel light in the rear once you get an engine with any torque. In any case, I'd advise shopping for a car that's already been swapped. Lahore doesn't have many, if any, mechanics who are good at this.