Decided to keep the car stock as I had to go to Quetta. There was just a bit of air going into the pump with the fuel as the diesel lift pump was not working properly. Changed it and now it has a lot more power than before.
And regarding the jerks, a mechanic in Quetta told me to convert it to part time 4wd instead of all time, he said he’ll just remove one part and I agreed in order to make the drive a bit better for the time but that was a huge mistake as the car stopped shifting and was making grinding noises at times. I got the old parts fitted back into it and now Im looking for a good condition differential,which they call gucha out here and so will change that, which I think will eliminate the slack in the front driveshaft which you can see in the video shared.