ericr,
I don't understands about the body blocks being obstructed by the curtain pan. I thought the curtain pan was set into the area under the front seat on 29 roadsters. There are no body blocks near the front seat frame that I know of, they are all under the body subrails. Can you privide a picture as I can't understand the body blocks you are referring to. I understand there are a pair of bolt that hold the number 4 blocks in place, but they are not obstructed that I know of.
Rusty Nelson