Anything can be improved. Consider use case (how it's used), the need for ROI (return on investment) and 'what the neighbors will think'.
If it doesn't have fuel injection that could help. But also a transmission swap might do wonders. Wheels and tires are where the rubber hits the road, so to speak.
Tall and narrow is the fashion.
Stance. How low can you go?
https://car-from-uk.com/ebay/carphot...ebay483990.jpg
Do you smell exhaust inside or outside the car?