I'm thinking that cams would be near the bottom of the mods list. If you divide the power by displacement, then multiply by 650, you come out near 50 HP, 5 more than the 650 Bonneville in it's best factory trim. That tells me that the stock cams are pretty well optimised, so there is not likely to be a lot gained without a significant loss elsewhere in the operating range.
Now, *AFTER* a lot of other mods, this would be a different matter, which is why I say move different cams to the bottom of the list, but don't take them off.