I would always run ARPs, there are no benefits to sticking with the stock bolts that stretch when torqued, stretch when running high cylinder pressure, and are not reusable (even if they are "in spec" for length, IMO).
I'm not sure how good the felpro gasket is, but the stock composite gasket always worked very well for me, and I ran them right up until the end on the 2g. I'd still be running them, but the EVO uses a metal MLS HG stock. I'm sure the felpro will hold long enough for you though, but remember that timing is far more critical than boost as far as the HG goes.
