Originally Posted by TNshadetree
I'm building a vortec head based 350 roller block and haven't picked up any valve covers yet. I am using the 1.6 ratio roller rockers that come with the GM Hot Cam Kit. I like the stock stamped steel center-bolt valve covers and would like to use them if possible. Have any of you guys fit these rockers under the Chevy valve covers?
The GM 1.6 roller rocker is a Crane design, it will fit under GM center-bolt covers. Other roller rockers either in brand or different models of Crane may have interference issues with the center bolts. You may grind and polish a clearance as necessary or convert to perimeter bolts with the purchase of adapters which are expensive or the fabrication of same if you have some tools and talent (saber saw, files, electric drill in case your shop is missing a milling machine, and a tap set will work fine) for a lot less money if you can find some quarter inch aluminum plate.