Another 454 Valve Adjusting Question?
 

I've adjusted the valves on SBC and BBC my whole life but I noticed something I never noticed before and that concerns me! While doing a running adjustment on my 1973 C20 454 I noticed on some of the studs (the rocker arms are nutted down to) show more threads than others, a few studs show 2 threads, a few show 3 threads and a few show 4 threads! I know they all should be pretty much even so I'm assuming on a high mileage engine some lifters may be a little week and require more tightening, is the right or should I make them all as even as possible?

http://i1137.photobucket.com/albums/...ps500f19d6.jpg

I know the image is a SBC and not a running adjustment, I just found any old valve adjustment pic for reference.

Re: Another 454 Valve Adjusting Question?
 

Possibly camshaft lobes wearing down.

Re: Another 454 Valve Adjusting Question?
 

I recently did an adjustment and visually the rocker arms looked like they were all rocking the same amount of distance. Now if I measured them I could be in for a surprise but visually they looked good.