Need advice!!!

Hey all. My name is Adrian and I am considering doing a bit of work to my mk2 escort. I've talked to a few mates and what I've been told so far is to get a twin weber 40ml sidedraught carby setup, a salisbury 8" lsd, a tailshaft to suit and a sierra 5 speed gearbox. It would be most appreciated if anybody has any feedback or advice they can give me. i.e different parts or where to get the parts from. As far as I'm aware at the moment the diff is the only thing that will most likely have to be ordered from overseas. I don't want to spend an absolute fortune. My main goal is squeezing a bit more juice out of the car and making it alot more enjoyable to drive on the whole.
Cheers guys.
Cheers guys.
