My old car was deadly on super stock springs off the foot or the brake
Weighed 3350, uncut, untubbed 70 Duster, full backseat interior.
Typically 1.34 60 foots, 9.80’s then 9.50’s after couple of motor upgrades(W5)
So, IMO, you’re nowhere near the limit. I ran cheap CE 3 way shocks on all 4 corners, no snubber, no clamps.
Car was truly deadly, I remember one dead of summer event car ran 10.01 5 passes in a row.
28 by 10 quick time pro tires