Stop in for a cup of coffee

Engineer should get you a LIGHT and STRONG roll cage, Emphasis on the light. Anyone can weld together a strong cage, but how much does it weigh?
plus, the goal for this car is to be that of a stock A body small block car. With the amount of weight savings i already have done(roughly 417 lbs) i should be able to come in around that mark. i'm estimating about 200-250 lbs in the cage.