Yeah, suspension and a clean pair of shorts! I nearly crapped myself about 10 times tryin to get a good time on the 'Ring in 1970 Charger R/T.
After a couple setting changes to keep the back end from slidin out on me, I was good to go though. 👍
Let me know if what type of setting your looking for in each of the cars you mentioned and I'll get them to you, been working on one for the Charger the Chevelle is set up just about right for some fun.