There are all kinds of options on material, bearing or bushing, ratios, offsets........ You could PM me or email for more info Mr. Dale if you wish. I do some special deals with head purchase, etc.  Base aluminum rockers for Edelbrock, BBM, or iron with bearings and spring oilers "racer price" was $1552 at the end of the year, but they will increase by a small percentage for 2020.  I ordered several sets in December to get 2019 pricing, because they inch up a little every year.