'84 1/2 ton 2wd, '74 350 interceptor questions

[Your41Plague12]

Basic things like headers, an upgraded ignition (MSD is popular and works well), and a good tune on your carb should bump HP up a little. Sounds like you have a good starting point, just make sure you get the correct-strength valve springs when you do your cam and lifter set. Roller "anything" will typically help in power too, but not a lot. It's only once you have roller "everything" that it will be noticeable, IMO; less friction = more usable power. Just some food for thought. It all depends on how much of a budget you have.