I have heard that roller rockers do not fit under the cobra aluminum valve covers. Is it a design issue or a brand issue? IE, is it only certain brands of roller rockers that don't fit? Also, I have seen some stuff about the baffles in the aluminum valve covers being removed and replaced with a custom bent piece of sheet metal. Is this possible, ie, does the valve cover itself clear the rollers and the baffle doesn't?
BTW, I'm talking small block, 289/302 here.
Any info would be appreciated, thanks