A Road Race car is going to be more fun on the street and still perform well on the drag strip compared to how a Drag Race car will perform on a road course.
Think of how the new Challenger and Chargers are. They are excellent street cars, fast at the quarter mile and great road course cars.

There are a number of aftermarket replacement front and rear suspension companies ready to take your money but in my opinion, the gains they may offer come with drawbacks and also have a high buy-in cost.
One big gain is oil pan clearance. Yipee! Another is header clearance. So what? Dougs and TTI make headers that fit around a stock chassis anyway. No gains there in my opinion.
The kits are shiny and have all new hardware so that seems nice.
Think about cars like the Mopar Action "Green Brick" 1969 Valiant. It retained torsion bars and leaf springs yet was a top contender in road course events.
You don't need Magnum Farce, RMS, Gerst, Hemi Denny or a Schwartz setup to ride well, handle well and hold together.
There have been instances of these aftermarket parts failing....broken welds car ruin more than the suspension.