anyone ever compared the gaskets to see what doesn't line up?

edit:
reason: I found a cheap sheetmetal drag manifold for an H22 and want to use it on my H23

 

the top half and throttle body will bolt on but the h22 manifold won't bolt to the h23 head

 

ok.. first your wrong.

both intake manifolds have swapable tops, take the h23 top and replace it with the h22 one.. but even that is pointless because i put an h23 tb on a h22 manifold so i guess the other works..

also the mounting pattern on the h23 manifold is COMPLETELy different...

some holes could be drilled and tapped, others well you would have to add material for them to fit...

aka it's hard