rocker arms
they are NOT a simple bolt on....not hard if you kknow what you're doing...and have the tools. but not easy either.
search around...one of the companies ( i think yella terra) offers "upgrades" to stock rockers. little more cost effective.
i'm not aware that any of the higher lift rockers interfere with the covers. although i did have to clearance a little for my HS 1.7s...mostly just excess casting along the inside edge of the head-valve cover gasket surface. nothing 5 mins with a hand file couldn't solve.
https://ls1tech.com/forums/showthrea...hlight=rockers
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