The so called street kits have 60' times all over the board in something that leaves hard Urethane is not as stiff as a hiem joint

How fast do you want to go? & how much street driving are you going to do?

I can tell you from past experience if you ride hiems on the street & you don't grease them regular your next launch may be into the next lane

You can run 10's with leaf springs cheap & lower it till the frame sits on the ground