Racing with Cragar ss wheels

I've run my 15-8 unilug cragers on 2.75 x 60 BFG drag radials over 100 times with no problems. I'm not super fast with my 318 four speed though. 13.7 and 1.97 60 foot is my best. Maybe I'm ingnorant or stupid, but I never gave it a thought about the unilugs. I was more concerned about spinning the extra weight and how much it might slow me down.