Roll bar tubing size and thickness for a 5200 lb brick.

I have to put a roll bar bar in my 4x4 truck this year. She runs a 7 flat in the 1/8 and 11.20's in the 1/4. I was lucky enough not to get the boot last year, but I know this year will be a different story. I've been home, sick for the past few days and my NHRA rule book is at the shop. My question is, is what diameter tubing and thickness do I need for the beast? BTW, I'll be using chrome molly. And yes I'm nuts for running such a fat pig down the 1320, but we still run a 3160 lb NSS/A. Either way, they're both a blast to drive.

1 5/8" x .083 wall moly tubing