U need to do a **** load of research if u want to attempt it ur self... Or take it to a shop and tell them wat u want and write an open cheque lol
U need to set a goal... Wat u want to acheive with the car... Drags/street, circuit/street
Wat power you want...
And then research alot! Find out wat mods r needed to make X ammount of power out of an sr20... Pick wat model sr20 u want(NOT fwd) Wat needs to be done to do the conversion into an escort
The list is endless...
Custom engine moutnts
Custom gearbox mount
Hilux/borgwarner diff
Custom
Tail shaft
Suspension
Brakes
Intercooler
Radiator
All fitting piping hoses fuel system, cooling systemetc
Computer
Wireing
Fuel pump+filter
And thats jus fitting a standard sr20...
If u want somthing around 260rwkw
Then ull need somthing like a gt2871r turbo
turbo lines
Manifold
Custom cooler piping
Injectors
Man u need to figure out wat u want from the car and then start laying it all out...
Write it all down, shop around get rough prices for everything add it up and make the decision...