help: how to tell T2 block from an N/A block
 

i been looking almost everywhere im trying to figure out the different on a t2 and a n/a engine i got alot on irons and rotors and also housing and im trying to send them out to get an t2 rebuild but i can tell witch is an t2 or a n/a iron housing and rotors can someone help me

the na end ones will have 2 holes and the t2 will have one,middle if its s4 na will have egr on top not sure if s5 do,and the front t2 will have the oil feed bolt for the turbo..housing na have a funky sleave,and rotors will be a bit more difficult clean them good and look at the dish and weigh them..s5 and up have the machined dish s4 are ruffer..good luck

Turbo : http://www.sjperformance.com/images/turbo2.jpg