208 and below generally work well with smaller turbos and have more lower/mid range power, above 208 works with larger turbos and will have more top end. Depends on whether you want a street prowler or a 1/4 mile car. There are other considerations, but that basically sums it up.
If you have ported heads I would go to a 212/212 comp cam, I'm assuming your intake is ported to your heads also. Weld the outside of your stock headers and port the inside to your heads/ gaskets, it will breath better, good luck