I can't see where there is a minimum clearance for cage to helmet. The SFI specs show 4" behind the front hoop and I believe 3" from top of helmet to bottom of cage. But in reading LSR cars under construction I see much tighter clearances, like a 1/2".
Anybody have experience with what the tech guy will want to see? I understand there will have to be padding too.
Thanks, Oj