Chassis and Wheels

hi there.
anyone know what best to do with 4g91??
what i've done was change g/box to 1.8 with trinity plate and exedy racing pressure plate. but change back to 4g91 g/box. mahal seh nk maintain. keras bapak nk tekan clutch

in my list is
1. to do port and polish together with modified cam pully to adjustable
2. change cam shaft to gsr cam or other 1.8 cam
3. change throttle body, ecu, air flow sensor and knock sensor (if i not mistaken la) to 1.8.
4. install e-manage with aerospeed...