I think they are the same. I had a rusted 68 gto convertable frame. I used a 68 lemans hardtop frame. I had to cut the boxed section off the conv. and weld it on the hdtp frame. one side was so rusty i couldn't use it. i went to a junk yard and cut the boxed section off a 68 chevelle conv. frame and used it. it fit perfect. just check the body mounting holes. if they match i see no reason not to use it. if they don't match cut the missing mounts off one frame and weld to the other.(posted 7475 days ago)