" grumpy I have a custom set of big block valve covers that I don,t want to replace, but I have just installed some roller rockers and they touch the edge of the valve cover , any suggestions"
your problem is common and its fairly easy to correct in many cases with valve cover spacers that lift the valve cover 1" giving you more room under the valve cover for rockers or a rocker stud girdle ,yet not changing the look or requiring new valve covers too be used, obviously the first step is verifying where the clearance issue is and how much clearance is required to clear the problem.
ANSEN 7661 BB Chevy Aluminum 1" Valve Cover Spacers Polished
if you want to ad durability it takes some extra oil system mods but spacers that spray oil to cool valve springs are available also, but you can fabricate valve spring oiler mods to valve covers cheaper your self if you have minor fabrication skills
http://www.hardin-marine.com/p-16736-bi ... ilers.aspx
viewtopic.php?f=52&t=6491&p=20681&hilit=valve+spring+cooling#p20681
BTW using load spreader clip tabs between the valve cover hold down bolts and the valve cover helps prevent leaks, bent or cracked valve covers
your problem is common and its fairly easy to correct in many cases with valve cover spacers that lift the valve cover 1" giving you more room under the valve cover for rockers or a rocker stud girdle ,yet not changing the look or requiring new valve covers too be used, obviously the first step is verifying where the clearance issue is and how much clearance is required to clear the problem.
ANSEN 7661 BB Chevy Aluminum 1" Valve Cover Spacers Polished
if you want to ad durability it takes some extra oil system mods but spacers that spray oil to cool valve springs are available also, but you can fabricate valve spring oiler mods to valve covers cheaper your self if you have minor fabrication skills
http://www.hardin-marine.com/p-16736-bi ... ilers.aspx
viewtopic.php?f=52&t=6491&p=20681&hilit=valve+spring+cooling#p20681
BTW using load spreader clip tabs between the valve cover hold down bolts and the valve cover helps prevent leaks, bent or cracked valve covers