Analyze My Timeslip

You need seat time as others have suggested. Your 1/8 mph shows 110mph quarter, if you can get it to leave. A two tenth improvement at sixty foot,1.77, can mean five tenths on the other end, and 500 hp should be able to go 1.67, even with 3.55s. The weight and gears are holding you back. If you can't get the drag radials to work, maybe some 26"tall real slicks, to crutch the gear ratio?
(And lifting early has minimal effect on e.t, substantial effect on mph. 60 ft. Improvement has a dramatic effect on e.t., next to nothing on mph.)
Knowing you want to keep the rear gearing, I would agree about some dieting......of the cars weight and more practice. Very nice looking MoPar.