My experience has been this.....
CAST aluminum pan : you can use the 2464324AC re-usable gasket.
ANY steel stamped pan: use the cork/rubber impregnated gasket if the pan rails are straight..

I know some of you guys will cry BS, but I've had a FEW leakers and I'll stick to what I say. Nothing worse than a leaky pan after the blanket's on there...makes a messy scene.