The stock focus cams wouldn't yeild any sort of power gain. If you had a set of SVT cams they could be beneficial. Just make sure you nab thier lifter buckets - Use what came with that cam. I was always under the impression that you needed to shim the mechanical lifters, the hydraulic ones being self adjusting (the reason they are hydraulic). Either way, the shims are very inexpensive from Ford.

95 Contour, Custom EVO bodykit, 2.0l, PNP Focus head, Stage 2 cams, Je pistons, Eagle rods, 4in1header, 2.5" header back exhaust(complete stainless), D P nitrous, ram air intake, 10mm wires, flamethrower.