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All i did was cut a little here and there, drill some holes and shape the ports to the shape of the SOHC head. It worked I did have some blow by seen in the last pic at cylinders 1 and 4. It contacted the A/C bracket I trimed the bracket with a grinder and used the smaller under drive pully with no alternator pully. Another option would be just get a larger belt. I lost low end power but gave me a chance with the top end. Email me if you need any help with this mod.