Right Stuff Detailing just bent up a choke tube for this application. The part is from my 70, but I think it fits any 250 six with the rbs carb. When I sent in the old tube I wasn't sure how much of the tube extends past the "collar" (end that sticks in the exh. manifold) so they cut it a little long. You'll have to trim a little off. It's not in their catalog yet, but give 'em a holler if you need one (800-405-2000). www.rightstuffdetailing.com Tom