1) you have to decide if you want to run a certain class with your car. x275,nmca,orsca, pro nostalga. and see what they allow for suspension's.
2) how knowlagable are you at tuning suspensions.
Gotta think, if he is asking which style of suspension to put under a 10 second car, they're probably just starting out at that level. Caltracs would be a good place to start and would not involve any real fabrication ($$) like some of the link styles. You gotta wonder when you see a gutted, tubbed, 4 link, dedicated race car that 'only' goes in the tens. Why go to all the trouble?
And really, if you're running a car in X275, NMCA, 'Pro' anything etc., you probably have a pretty good handle on things already.
The cars' weight should be the determining factor. A 68 Valiant is going to be around 3,000 with a roll bar, depending on how gutted it is. May end up less. Do you need to put ladder bars under a car like that? Probably overkill. Once you're deep in the 9s, then you start thinking about that stuff, along with lowering the car etc.
