Hey, yeah that's all i have to know, because im installing a tfs intake manifold with a 1" spacer and need to know if i need to install gaskets...and if i do, do i need to put them from both sides as well...
and yes you will need gaskets. without them you will have a constant battle with vacuum leaks, no matter how much gasket gunk you put between them. also, if you use the 1 inch spacer with the trick flow intake and get the trick flow rounded looking valve covers, you can take your valve covers off without having to remove your intake. freaking sweet.