I'm with Bob on the triangulated 4 bar. IMO a panhard bar belongs on a circle burner car set up for left turn only and not on a street car... With parallel 4 bars, a Watt's linkage is a much better method of keeping the rear end centered under the car.....

As for the front end, if you want it in the weeds, excellent geometry and the resultant good handling, don't rule out an IFS front end.... There are many available that will fit and work equally well under both fendered and non-fendered cars....