I've been looking at piston/combustion chamber coatings. Are these worth it on a weekend warrior motor?

What about paint/epoxy on the lifter valleys?

I am looking at the lifter vally "breather vents" that allow the pressure to vent, but stops the oil from draining on the cam and creating windage. I have heard good and bad about this one. What do you all think? I already have oil restrictors and a good oil pan w/windage tray and scavanger.

I am rounding off all of the sharp edges on the pistons and block. The heads combustion chambers are rounded as well. (no sharp edges)

Chamfered all of the oil passages.

I can not go super/turbo charged, and don't want to buy a $$$ rotating assembly etc so I am looking at the little things. Any one have any ideas that would help glean more HP out of this 383?