You auto or manual?
For me Best tire 20” tire I’ve tried so far is the NITTO NT05R 315/35-20, liked them’d so much I just bought a new pair, probably got 75 or more passes on the first pair this past season. Best 1/4 time at the track 10.734 at 134 at 17 psi, I don’t like the sway any lower, this with a M6. On the street I run them at 26 psi and with no burn out do 11.3 133 1/4’s with 3.2 0-60’s pretty consistently. I wish they made them wider like a 345/30-20 I’d be a buyer.
With an auto if you want to be quicker it’s about hooking up, so tires and suspension. If you want to go faster and quicker add a 2.85 pulley and set of demon injectors and a tune and it’ll liven things up allot!!