The funny-looking keepers are "bridge clamps".
Someone may have left out the "alignment sleeves" that keep the intake aligned wth the head (no, the bolts won't do it). If left out, the manifold may warp over time (this happened to me, a PO had left out the sleeves). It won't damage the intake, it's the exhaust that will be warped; such that when the bolts are installed at the ends, the intake is out of alignment.
The sleeves are like $5 from any "re-pop" outfit.
Gaskets are cheap too; put the shiny side out.
