Jeff their right about the air presure. I had a 69 chevell that was a 6.40 1/8 mile car and it had M/T 10.5x 29's with a 5.13 gear and no one could drive that car all out with less than 14 pounds of air in them 13.5# all over the track, 14# you could run it down the track with your little finger.
I called Mickey T and they told me to start at 18# and work down 1/2 # at a time to where you had great traction it and ran straight. my majic # was 14. but they are all different. my 14x32 M/T's on my new car 8# .Always remember though let off the gas and run it again if it aint straight somethings wrong. Be SAFE,
Andy