TNT last night

What fuel pump, line size and regulator?

Jet it up until it slows down.

If you don't have adequate fuel supply, you could jet it to 100 square and it won't make a difference. Once the amount of fuel available runs out, jetting won't help. Just something to think about. That's why I ask about you fuel system.

Spring clamps go on the front segments of the springs, you shouldn't have any behind the shock mount plate on the rear section.

Do you know where the pinion angle is set? That's the first stop IMHO. If that's not in the necessary range, anything else you do is a band aid.