On my 1969 GTX I have BF Goodrich Drag radials that are 295/65R15 on 9” Weld Drag stars that really fill up the wheel well nicely! Oh, and the BS is 4.5”

8” would be too narrow, in my opinion...as I am going with the Hoosier QTP 29/11.5/15’s like you are looking at. On my 1968 Super Bee, the 10” with 4.5” BS would work better. I think, but I already have another 9” set to use.

Mark