If IT WERE ME---since you already have a 5500 stall converter (good, I hope) I'd first make sure I was leaving while up against the converter. I had a similiar equipped but MUCH heavier car & would 60ft in the 1.30-1.33 range. Don't know what tire pressure you're running, but we almost always ran around 9psi. one way or another I'd find some way to loosen up that front end & for that matter, later on, if you have no luck, perhaps even lighter rear springs so as to the allow the back end end to squat---it looks like your back-half isn't working either. For me, if the car "pitches", your suspension isn't working evenly which could cause or is a sign of another problem---just MY , but hey!----you asked...