rear suspension? 4 link? caltrac mono leaf? street lynx?

I run some local street car stuff with my n/a Dart and have done well in the past and can still hold my own against n/a cars. The boosted cars are hard to handle with all the electronics controlling the launch.

That being said I've considered building a 65 Dart I have to run in the class, figure I can lose 500 pounds over what I have now. If I do it will have a four link, no questions about it. Considering the Mustangs that seem to dominate the class for all intents and purposes come from the factory with a four link.

My fear is that if I start beating some of these guys they'll cry and get the rules changed to eliminate back half cars from the class. Then I'd have a bracket car with tags on it.

I hate to admit it but I've considered using my motor in a late 90's, early 2000's mustang just to get the rear suspension. In the long run it makes more sense dollar wise.