Lifter Swap, is it worth it?

Hi All,
I lurk, read/ research on this website a lot, and have learned a ton over the years by reading through various forums. Many of the "what is the best lifter or best cam" discussions lead me to the question below.

My current setup. (Please keep in mind this was put together long before I realized the importance of matching/ optimizing/ documenting components used in a build). This combo is certainly no power monster but does pull pretty well above 3k.

• 318 bored .020 over/ stock stroke (78 block)
• Ported 360 heads that have been shaved .040 ( I can't remember the calculated comp ratio anymore, high 8's low 9's is what is in my head)
• Cam is a Comp XE268h. Using Rhoads original lifters.
• Edelbrock performer that has been gasket matched, topped with a ThermoQuad
• Dougs D453 headers
• 4 speed / 3.55 gears

The question I have: Am I leaving any or enough power on the table with the Rhoads lifters to warrant switching to a "regular" lifter. My only reasoning for using them was simply that a stupider me read about them being of good quality rather than understanding mechanically how they work. My current suspicion is that with the current combination I would not notice much if any change in performance with a simple change to a regular lifter.