cam gears are used to advance CAM timing, not ignition timing, they're totally different, and if you have cams it's likely you'll need adj gears.

The skunk2 manifold is PROVEN hp, and WELL worth it's tag. However it is not 400 bucks. More like 300-350. Don't port and pollish your head, Honda heads flow well enough.

Crower cams make GREAT power with LS's