I had my BBC (1970 402) rebuilt. My engine guy said the roller rockers could be re-used. Big mistake. I should know better too. They were in the old mill for 25 years. The new engine utilized the old forged crank, rods, slugs, new brodix heads, new hi lift solid roller Lunati cam (650 lift) and the probable killer...550# springs. Im sure the old springs were rated at much less, and were tired to boot. I never had a solid roller before but my buddies convinced me its the only way to go. All I do is worry its getting out of lash. Well, it was. One day i decided to check them so I ran it around and got the engine20161019_205931_1478004450720_resized.jpg20161022_175701_resized.jpg hot. Pulled a valve cover and the first thing i saw was a broken rocker. One side of the trunion was loose and one side of a rocker yoke was laying on top of the head. Push rod still in place, and is straight. Thought i dodged a bullet. I ordered a new set of Lunati roller rockers. WOW were they beefy compared to the old Crane Golds. Anyways, after replaceing them i noticed all the old cranes had a lot of wear from the stud. They had been wobbling. This shaved off a bunch of aluminum. Well, now i am smoking, a lot on start up, somewhat less when running. I figure the aluminum went down around the valve stems and ate up my seals, possibly the guides too? Most concened about the cylinders. ANyone have any thoughts on what to do? I hate to tear it out and break it all down. I did three oil changes and no longer see aluminum in the filter. But the damage is done. QUestion is, how far? Do you think the valve guides are bad? As far as i can tell, no big chunks of rocker left the top of the head. The one piece i found fit perfectly back on the rocker. But there is a lot of aluminum missing from the rest of them due to chafing on the stud. ANd i can see micro bits of aluminum laying around the keepers. ANy input appreciated. Thanks.