[Formulajones]

I'd be inclined to leave it alone at least until you dig into the current cam and find out what it is first.

If you really want to change the cam it makes more sense to leave it a roller so you aren't buying more parts. Just get a nice 230 @ .050 roller if it's a 455, or something in that neighborhood. Butler has a lot of choices in that range with 112-114 LSA that plays very nice with PB and AC. Then you're just stabbing a cam in.
My opinion on heads if you want to change those is that you'll have $1500-$2000 easily in a set of iron heads fresh and setup properly at which point I'd just get yourself a set of Dport aluminum Eddy's or Kauffman's and call that done. I don't even screw with iron heads anymore unless it's a numbers build because they really dont save me anything that's worth worrying about.