Googie,
I recently did this with my 1991 RV-6A kit by working out the position of the front rivet (from design dwg) and then spacing rivets locations out along the top of the rib. Then I simply placed the rib on the bench and marked lines square to the edge of the bench at these spots and clamped a block to the bench to simulate the spar. Finally, clamp your ribs one-by-one to the block, square up the flanges and flute top and bottom flanges to make the rib flat. All the ribs are the same - just make sure you copy the pattern to your skins if you drill them before the ribs.
Finally, take care that the inboard ribs have 2" rivet spacing with the blind rivets.
Good luck.
Mark D