MadCat, No, you are not correct.
351W or any small block Windsor (221,260,289,302,351W) all have 6 valve cover bolts. The 351W is a tall block version of the short deck 221, 260, 289 and 302.
The Cleveland family of engines, (351C, 351M and 400), have eight valve cover bolts. The 351M and 400 are taller block versions of the short-deck 351C.
The big block FE family of engines (332, 352, 360, 390, 410, 427, 428) have five valve cover bolts.
The big block Lima series of engines are the 429 and 460. They have seven valve cover bolts.