I use Royal Purple in 10/40 or 15/40. Maufacturer says 1300PPM zinc. About $9per quart and available at OReilly's. I like being able to drive down and buy it off the shelf instead of having to plan months ahead to order some ZDDP. Some use Brad Penn racing oil. Probably find it at your local speed shop.

What else you need for a roller depends on Hyd or Solid. They all require a dist gear change unless you buy one of the new ones that are made to use with your std gear. New pushrods(different size). Possibly a different valley pan or adjustment with a BFH to yours for clearance of lifters. Depending on lift of the new cam you may be looking at new springs. You'll be better off if you go with something of a comparable lift as you already have otherwise there's longer valves or machine work of the spring pockets/valve job involved.
Pretty simple, eh?