Is it worth to give S.A.T II(S.A.T. Subject Tests) Or should I give S.A.T. Subject Te

<p>Hi,
I am from a South Asian country and I am looking forward to give S.A.T.s for doing Engineering Majors/Undergrad from U.S.A. I have already registered for S.A.T. I and kinda prepared for it, should I also give S.A.T. II(Subject Tests). I mailed a lot of colleges for this and came to conclusion that some colleges require S.A.T Subject Tests while some do not. It totally leaves me in the dilemma whether to give it or not. I don't really have plenty of time so I am more inclined towards for giving just S.A.T. I but I do want to go to a good college!
Is it worth giving the S.A.T. Subject Tests? If yes, how difficult are they? Plus, which subject test should I give for Engineering Majors? (I assume Chem, Maths II and Phy).</p>

<p>Thanks in advance!!!</p>