I would check what rpm you start skidding the front
tires... thats gonna be the major factor.. the higher
the rpm the closer you will be to your max torque..
a low rpm does hit the tires harder(its wind up that
slaps the conv.. and in a lot of cases will blow the
tires off at the hit... a higher rpm(closer to the stall
is less of a slap to the conv).. on my TB I could NEVER
come off idle.. I had to be up in the rpm to some point