ET difference from 3.91s to 3.54s

Yeah I really need to weigh it in its current state. No carpet saved me 35 lbs? But roll bar added ??? And I've seen lots of different opinions on weight difference between the 8 3/4 and the Dana 60.

The reason for the roll bar and Dana is that I'm putting on a Procharger in a few weeks to shoot for mid 10'secind 1/4 mile times
Yes i agree safety first. Also the roll bar helps to stiffen the chassis to get the car to launch better