Depending on how much you paid it seems like a good start. Dave/IC2 has made some good comments which I agree with but I thought it was old school engineering to only use a tube front axel with hairpin radius rods. With a four bar set up there will be a twisting force on the axel when one wheel dips more than the other. A standard I-beam axel can provide that flexibility while a tube axel is more rigid and may eventually crack under severe use. The formula I learned was to use hairpin radius rods with a tube axel so the hairpins would flex or use an I-beam axel with a four bar setup. Since you have the four bar set up it might be a good idea to swap out the tube axel for an I-beam. Perhaps others here can comment as to whether they have ever seen a tube axel crack when mounted in a four bar geometry. Even so you have a very good start on a classic roadster!

Don Shillady
Retired Scientist/teen rodder