soft 60' times

I can get to 87 mph after a dismal 1.95 60 foot in the eighth when I make ok traction. I think that I’m very stiff and 5500rpm is the wrong place to shift.
Is your chassis tied, With subframe connectors atleast ?
The stiffer your chassis is the better it will react
(With the right shocks)
I'm hoping to atleast get a few runs on my car this season, I'm expecting a learning curve since it is a very stiff car.
I can jack up the front of the car from behind the driver front wheel and the rear driver side lifts off the ground too.