I work close by the summit racing store and run by there to get parts when I need them. It is nice to have a place that has so many parts in stock and not have to pay shipping. Here a beter link for those of you like me that had a hard time finding it.
I live about 7 miles away from Summit in a town called Blackhorse between Kent and Ravenna. You come to Summit, send me a message. come check out my 65'.
Probably not as nice as your Caprice. But it has a BB.
???? Not quite understanding the question. If you want to include another responce as a quote we have a button on the bottom of the reply window for that.
For a pro stock engine builder like Greg Anderson (studied under The Professor Warren Johnson for seven years) and Jason Line (his specialty is induction and carbs as a dyno jockey and he has a bachelor of science degree in mechanical engineering) those are off the shelf parts.
But for the rest of us you have to order them already coated from Mahle (they come with a thermal coating on the top (be sure you do not need to fly cut your valves for more lift) and Teflon on the skirts with an oil shedding coating under the piston, or have JE or Ross add them for an additional (but not overly expensive ) fee to your pistons.
Like I mentioned above if you are going to hand smooth the pistons after further machine work to gas port or cut a deeper valve relief then coat them after you are done not before. There are several companies applying coatings to pistons, valve faces, and aluminum combustion chambers (for a nominal fee); and just like powder coating you can apply some of these at home (just not in your wife's oven as they are toxic and add a real stench to food being cooked later).