I'm in the same boat with my 69. My cowl is ok, but I have a new dash panel that the previous owner of the project only had temporarily screwed on. I'm getting ready to spot weld the new dash in, but am also wondering on placement. Should a guy screw it on, then lay the wind shield on to make sure everything lines up, or is there some wiggle room for installing the wind shield if everything isn't perfect with dash placement?