DOES THE HDK SUSPENSION K-MEMBER HANDLE BETTER THAN A T-BAR SUSPENSION?

Denny I am 4 seconds (that’s a lot) faster in my Miata with a 1.8 liter engine that makes 140hp around Fontana than I am in a Camaro SS with an LS3 that makes 485 hp. It’s not about displacement. I had hundreds of laps around that place in many different cars.
Your Miata , stock weighs about 2100-2300 lbs. Camaro add at least 1000lbs.

Plus. weight balance in a Miata is approx 50-50

Camaro is nose heavy.

I would think your entry speeds into a turn would be much faster and exits much quicker easily gaining you your 4 seconds.