I'm at least a few years away from building an RV. Could I still do transition training with Alex or someone else in a RV-6 or RV-7?

I have been wanting to get a taildragger endorsement, and have REALLY been wanting to fly an RV, so I figured I might try to combine the two. Is the FAA ok with me doing a transition course even though I'm far away from owning an RV?
 
Go for it...

If you want to get a tailwheel endorsement and/or check out in an RV, go for it. The FAA doesn't care what training your get. They do, however care that you are current when you "use" the endorsement, so plan on some refresher flying before you go fly your finished RV project. When you get around to filling out the insurance form there is usually a question about "time in the last 90 days" in other words, currency. Flying, especially tailwheel operations are not "like riding a bicycle." Personally, if I go more than a couple of weeks without flying my '8' I feel a little "behind it" for the first few landings.

John Clark ATP, CFI
RV8 N18U "Sunshine"
KSBA