Et street radials on a 4 speed ?

I run 275x50x15 M/T drag radials with a stick. There are two left SS springs back there. I dump the clutch at 4000 and go with no noticeable spin and that is without a line lock. It is a heavy car though at 3700 Lbs. 60 ft's run 1.7 to 1.8 for mid 12's. I drive to the track at 26 PSI and race em at 16 PSI. Two of my buddies run them also in 12 second 4 speed A bodies.