I live in CA with no smog for cars 1975 and older. That is huge draw for me to have a car I can modify and still drive it on the road. For me I would like a car like this
He has several videos and website that shows what he did for his build. Some of it may be useful for you.
If you are making a "track car" that is no longer street legal
you probably better off with fd3s rx7 ( already has double wishbone with good geometry ) will weigh about the same as 240z ( when both cars have ls1/6spd ). Or just go https://www.racingjunk.com/
and pickup a used racecar or stockcar meant for road race track.
Good luck with your build what ever you choose.