Alright....I have wanted to set the timing on my K5 but cant find the mark. I think the engine is so greased up the it is covering it. I have Gunked the s**t out of it and it still isnt visable. Anyone have any suggestions as far as an alternate way of checking and setting the timing? I have a lowly carb'd 305 in it still (but not for to much longer). On a side note, I changed out ALL of my vacuum hoses with new hoses and it is amazing the difference they make. I guess some of the older hoses were being crushed by the vacuum.