325/50-15

coker tire

bf goodrich radial t/a
or
cooper cobra radial gt http://www.discounttire.com/dtcs/searchTiresBySize.do?r=MPHINT|pc|48060&cs=295&ar=50&rd=15

there are more in other places but these are the most popular
found a chart of all available tire sizes on tire rack, might have been helpful if i just opened my eyes

You may have to go to a real big rim to get a 28" tall tire if you dont want drag radials.
does not have to be right at 28", just don't want something really short.....

Do you have rims already? I've done some cars on 18s that have a pretty good height and section width. You might even look into some light truck styles, they usually have more sidewall to get the diameter you want.
no wheels yet, but i do have a few that l like. just thinking out loud...