Can I get my Tailwheel endorsement without a third class medical?

I'm an instrument rated private pilot, but haven't flown in 10 years (or had a third class). I just purchased a Taylorcraft (light sport) and will have it flying next Spring. I plan to fly under Light Sport rules on my drivers license and don't plan to pursue a third class medical.

If I can find a TW instructor and light sport plane (J3), can I get an endorsement without getting a third class medical?

I'm in Michigan...anyone know of a J3 and instructor available in Mich or Wisconsin?

Thanks,
Dan