New floors and paint for my Valiant pick-up

The issue I'm facing at the moment is Roll bar? Or no Roll bar?
And so it comes down to how much will this thing weigh?

The engine is a 10-1 440, 906's flowing 270 with an xs282 solid, 800DP on a single plane, 1 7/8 header I figure 500hp.
If it weighed 3000lbs with me and hooks, its in the 10's??
120mph is the cut off for no cage cars here, so at that I need a roll bar, but cant be bothered fitting one! :oops: