Feel like 360 should have more power

that ^^^ (aggressive lump) + your low compression + your high altitude = a dog.
Kinda where I was going with my response. In order to do that, he'll need to figure out "what" cam he has now using a degree wheel and that will require some work. Because just opening it up and "advancing it 4 degrees" may not do much if it's say 12 degrees retarded. Know what I mean, Vern? So IF he's up for it, he needs to find out "what" he has now and "where" it's installed.