Mga sir im new here, i just need an urgent advice about changing engine.

My car is 91 EF sedan with a D12B1 carb engine, last diagnosis niya nung dinala ko siya sa forced speed sabi ni jeff is katok na daw and di na kaya for overhaul, i want to change my engine with a D15B vtec and im planning to do it this december....

So mga sir i need some basics and advice kung magkano price range ng D15B vtec, san maganda kumuha, magkano pakabit and nu mga recommendations niyo kung saan maganda magpakabit.....