Has anyone done this/run into any problems? The 600 is an 89 and the 500 is an 83. Only reason I want to do this would be the 500 has a street plate and the 600 doesn't have a title. Another question if I may sneak it in, the compression on the 600 seems somewhat low - when kicking it over you can kick straight through it. Any idea what could cause this? It starts real easy and doesn't smoke, leak, or make any noises. Other than that it runs good and shifts smooth. Thanks in advance.