I keep crunching the 1st to 2nd shift on my T5 trans with a Pro 5.0 shifter. Today I noticed that it might be due to the fact that I pull the stick towards myself when I do the 1st to 2nd shift. This is a T5 that was taken out of an '89 Mustang and rebuilt before I installed it in my '65 Mustang with a 302. I have no problems when I'm shifting normally, but from a hard launch, I grind the gears going from 1st to 2nd. Today was really bad and I know that I had the clutch pedal to the floor and the clutch is adjusted properly. Can you give me any suggestions on what's causing the missed shift and how to correct it?