You should figure out a total budget.
Chassis stiffness always helps for a lot of reasons but getting down to real issue requires suspension parts.
I created a stage one suspension kit to be a cost efficient way to make necessary improvements. This helps alignment and eliminates some unwanted play in the suspension.
Sway bars make a large improvement.
From there, spring rate is huge too, but the tire sizes need to be considered. I see lots of big/little tire combos that are not beneficial for handling whatsoever.
Lastly, my steering kits add modern precision to the steering, but this is steering only, not a suspension improvement.
