[DIYguy]

Glad to help.
I have had my manifold off a couple of times and it really isn't a big deal to do.
You should have no trouble with it.
Do be sure to apply a thin coating of RTV or sealer to the port seals.
They tend to leak air (mine were definitely leaking).
People say not to use silicone RTV on the intake because it could migrate into the intake valves and then into the converters, but a thin smear won't do that.
Also that was more in the days when there was fuel in the manifold (which can attack the silicone and swell it).
Not a problem on GDI engines of course.