What valve cover will fit ?
 

I have a small block chevy that has roller rockers and gill offshore dry pipes. The problem is that I need tall valve covers to clear the rockers, but my M/T tall covers hit my exhaust manafold. What can I buy, I need tall but angle on out side to clear manafolds. Thanks Kyle

????
 

How much do they interfere by ? I'm asking because I bought mine at diamond racing, They're plain cast aluminum (so you need to paint & put in breather holes with a holesaw), but on mine I just tweaked the corners with an angle grinder & they fit my stainless marine manifolds. I needed them with the stud girdles.

I ended up having to gasket match an aluminum spacer to fit in between the block and my exhaust manifolds to get it to clear.