Ok so I bought a twincam engine that needs a crank pulley and a rebuild for peace of mind! Hey I got it for 50 bucks what can I say! My problem is I saw this motor get taken out of a GTS and swapped. The cover on the engine I have said 4agze which is s/c am I right???? How can you tell what year it was produced and type as it has no attachments and I am new to Toyota engine codes and in general. PLEASE HELP ME!!