Hughes highstall convertor??,s

Hi, I want to order the 904 Hughes 3000 stall convertor,I noticed the ring gear is not on?What flex plate is needed and what size convertor?8,9or 10 inch?This will be going on a 360 with a mild cam,750d.p holley,8 3/4 with 3.91 gears.Thanks for any advise!

Are you dead set on a Hughes??..i'd look in to some other brands too i myself prefer Ultimate converters,Lenny the owner/builder is a great guy to deal with just give him a call 203-874-2100 tell him Dave from Boston recommended him.....