Here is a start-
AFR 165s would support 350 horses just fine. Cam choices are pretty broad and quite subjective, but for 1.2 hp per cubic inch you are going to want something with at least .550" of lift (maybe more) and at least 280* of advertised duration (around 230* at .050"
. Comp cams' XE274 is right in there. Of course you will need decent compression, 10:1 or more. Check out the 400 hp 302 built on this site for project 11.99. Lots more cam than suggested, but hey you want 350hp and not 400. I don't have a suggestion on the intake.