What to do...

Almost none... Got rid of the heavy bumper brace in the front, aftermarket seats and no rear seat, qa1 controls arms, caltrac rear suspension (I would think that stuff is negligible but there seems to be a small weight difference. Looks wise I'm just going for weekend warrior type look, but I'd rather have function. I'm going off the stock weight...3150ish+frame connectors75+me 330lbs...
Honestly if I can get it into the lower 11s NA up at my home track, it would be extremely competitive for basic shootouts or grudge night stuff. Once I get it sorted na I might add a 100-150shot, but not until I have more safety equipment.

I used to have a 73 dart just like yours. But mine was a big block car. 440/727 with a tunnel ram. The car was all steel with a plastic hood scoop, no back seat and two front seats. Had 8-3/4 rear axle with 15x8 weld Draglights. Tires were M/T 28x9x15 et street drag radials. Had B body drumb brakes on the back and stock disc on the front. I didn't have a roll bar in the car yet. The car with me in it weighed 3520 on a cat scale at a truck stop. Oh for got I removed the front crash bummper support, but put the factory bummper back on.