Rooster Comb and park switch
Governor valve/plug covers are different as well, and so are the castings. That will also interfere with swapping combs. Not sure when the change was made, but here's a '73 vs '67. I've always just changed valve bodies...
Governor valve/plug covers are different as well, and so are the castings. That will also interfere with swapping combs. Not sure when the change was made, but here's a '73 vs '67. I've always just changed valve bodies...