Yes you have it right!
Use the exhaust manifold gasket as a pattern, cut it out or have it machined out, bolt it up and start attaching your tubes for the headers and run them where you need to or where you want.
The 34 roadster is mine--Robert's blown slant.
You said something about exhaust manifolds? The intake manifold is the one that I built. No one makes a blower intake for a slant, so I built it myself.
