Yesterday I stopped by a friends house where he was putting heads back onto his 1955 Pontiac with 287 V8. This engine is untouched other than the top end. With the intake still off I noticed how nicely the lifter sat forward of the lobes on the cam (back edge of lobes to back edge of lifters with the lifters overhanging forward of lobes). This had me thinking back to what's talked about here a lot. Early cam failure with SBC's. Also what crossed my mind, all the aftermarket cams I've put into SBC's the lobes tend to be centered in the lifter bores more than I'd like to see. Now I'll admit, I've lost a couple of cam's but what I seen yesterday with the Pontiac, I haven't seen with any SBC with an aftermarket cam. So, it's a big so, could there be lobe positioning issue's with today's cam shafts? Since I do not have an early unmolested SBC to make a comparison with I thought I'd bring this up to see what others have to say about this outside of "you broke it in wrong", "no zinc in oil today" or "china crap". Oh, to add to this. Anyone ever place a spacer between cam and timing sprocket so cam can set back further "if" do able?