Your roll bar, sold to you as an "Interior bar" for liability reasons, won't do you much good without a frame tie kit. Saw one just like it push right through the floor on a single roll at Tellico. Sold a lot of frame tie kits that day. When it's upside down that's a lot of weight on two little points and sheet metal isn't structural. It's a good starting point but don't bet the farm on it saving you.
my $.02
Tim
my $.02
Tim
74 Bronco Ranger halfcab w/toys: lockers f&r, wristed arm, C4, D20, hyd assist steering, 37"MTRs, warm 302. Capability, that's what I'm talkin' bout.