worried
The Sportsman Pros probably wont hook that great. The Hoosier quick Times I ran hooked OK (325-50-15s) but they dried up and the sidewalls cracked in 6 months. The 275-60-15 M/T ET Street Radials I run now hook great and ride a ton better.
You should be able to get a 28" tall tire in there. My car seems to have the room for a 29" tire. Be ready to start breaking more ring gears when it hooks though.