delayed momentum / throttle response that's the issue with clutch kit. The petrol engine will smoke but seldom decline throttle response.
after reading the details here , i will suggest go by bus to Quetta. Visit the markets check for NCP Pajero of same model. if it suits your budget for restroation + some extra
The best choice will be swap to an NCP Shell with OEM Mitsubishi V-6 of same model, your vehicle chassis & registartion number plate will remain unchanged & the vehicle will be a Mitsubishi Pajero OEM V6 you an apply for engine number modification over the book at later time with the engine number receipt
wasting money for restoration will be useless.