99 chevy beretta (head gasket)?

[jwbennett36]

im about to change the head gasket on a 99 beretta and was wondering if anyone had any usefull pointers, tips, or advice on it. ive never done it before on a 4 cylinder so im not quite sure what im getting into. anything would be helpful. if im not mistaken the head is probably aluminum, correct? thats my biggest concern is that it may be warped...thanks!