1971 340 Build - Choosing piston rings dilemma

Thanks for the input, I have been looking at Total Seal a few times now.

Hastings have a broad range. Their premium Plasma Moly range is over $160 for a set. The higher price seems to be for the ductile iron top ring as opposed to just iron. Then they have phosphate coated for the cheaper ones. I still have not heard what the difference between Plasma Moly and just "Moly" is. Is it a different or better facing process? Or just technical jargon to make things sound like higher quality? I would like to be better informed in this area where there are so many brands and such a high range of prices, for basically a part that all do the same thing. I have a feeling that in the $300 and under range, mostly it all comes down to "Names and Claims". A $900 set of rings for a Top Fuel Dragster would certainly be in a different league of quality.
Hastings I like and have used in about everything.. I just put a set of those in a 340, havent run it yet. Was the steel ring vs iron diff in the set I bought. I wanna say they were 70 bucks. I'll try to dig up the part #