How much weight gain from adding a Dana and roll cage.

Mine I took a picture of on the scale after making a pass and posted it on here. Not all that long ago( this past summer). And anybody who has seen it knows it has no glass and no stripped down interior. And knows the size of me ..lol
I am a hater of people who say there car is heavier to make it sound faster.
I saw a rat motored 67 ElCamino once that was claimed to be 4600 lbs at the starting line. I didn't believe it .....till I saw the driver get out.

He was 600 lbs, and the drivers side of the car,went up two or three inches when he got out, lol!