[blykins]

How much money do you have to spend?

I did 600 easy hp with 445ci and a small hydraulic roller camshaft.

You can also do a 408, use the 225cc AFR heads, a Super Victor intake, and a solid roller camshaft.

Decide how much money you need to spend, and I can help you pick a cam.

Keep in mind though, a 600hp 408 won't be too timid...