hey search this site first and see what the guys that have done this swop have spent.buying the motor is not the problem getting it in and running there is were the budget gets blown to hell.a Rb25 fatbox( you want the fat one) is round about 6k minimum. plus your motror lets say 8.5k, now non of your old stuff from the CA will work .You will need managment, intercooler, piping etc getting someone(reliable) to fit it for you.if you gonna go the 2jz its probaly the morepowerful motor but you will still need a new box.supra box are k@k dier,and scarse but you can use a cheaper 21R box with a matching bell houseing , be prepared to pay more for the bell housing than the 21R. your prop willneed to be modified to adapt either way .remember this is all just the stuff you have to buy, never mind still the stuff that will make the install better, like changing cambelt,oilpump, water pump and the rb pumps dont come cheap but the 2jz stuff can be had over the counter at toyota probably for cheaper.make a list (a long one) at what you think you need and get some prices,it will quickly blow you mind.....dont be deterd a 6potter in a sx always a good idea but be prepared. owe and now you gonna have some more waight in the front a set of coilovers will help and them pupies go for around 8.5k (on this fourum BCcoilovers)good luck mate keep us informed and post some pics