Can someone tell me what is needed when i put a roll bar in my 69 dart. After running a low 11 sec time last weekend and with 10,s in sight, it looks like ill need a roll bar if i continue to take it to the track. My understanding is anything under a 11.50 needs a roll bar. Is there a point when you need a roll "cage" with the hoop above the wind shield? Ive looked in the IHRA rule book and cant seem to find the answer. The Alston chassis sight makes it sound like the roll "bar" is good to 11.00, anything faster than that, and you'll need a cage. After reading the latest Mopar muscle, Boligs Valiant was in the same boat, and after seeing the pics that have been posted from the Carlisle show, he has put in a "cage". If someone can help here, my next questions will be what make of cage/bar and can i put it in myself?