New to drag racing. Need advice.

I couldn't tell from the pictures if you have subframe connectors or not.

Anyway, rear suspension options from least to most expensive:
1. SS springs, long shocks, and adjustable pinion snubber.
2. CalTrac bars, Calvert split mono-leaf springs, and adjustable shocks.
3. Reilly Motorsports Street-Lynx system.
4. Classic 4-link.