My manifold is a earlier one, #6 I believe.
Here are the fitment issues with it:
1. You have to trim the ends to fit at the front, for the water cross over. I trimmed them to match both sides.
2. You have to have the gasket up to the bolts and stud, as far as possible and forward as possible, for the best fit. The holes are large and the reason I will grease them well, before carefully setting the manifold in place.
Note the arrows, this is where the gasket has the thinnest metal contact. The front hole only gives you about 1/16 at the c'sink, for the FE bolt hole. It shouldn't cause a leak though, because there is plenty of contact outside of that area and the hole, itself shouldn't leak. This is the area that I said you could put a cork in and silicone, to keep the vacuum from pulling on the gasket. The arrow at the rear, shows how that area is a little thin but, it shouldn't be a problem if, the gasket is positioned as I said.