Looking into possibly buying a set of et 240cc c5R heads for a 427. Will I be limited to a sheetmetal intake with these heads? Anybody know if this http://www.wilsonmanifolds.com/news/01020602.html will work with these heads?

 

know what angle the c5r heads are ?if there 15 degrees then ls1 stuff would work if there 12 then the ls7 parts will work... im pretty sure they are the angles for ls1 and ls7 but not 100% .they probly take the same intake manifold as the ls7 considering the ls7 has alot of similarity's with the c5r.. the link didnt work.