I have an 86 model 2400cc three door pajero. Engine is non turbo with manual 5 fwd gear. I want to change the gear to automatic, which has come as a stock gear for these models and available in market. Any technical advice? I hope with the non turbo engine with the auto gear will not become further slow? If so should i fix the turbo with the existing engine? Again, original turbos r available of these stock 2400cc engines? Pls suggest.