Inline 6 Intake / Exhaust Question

[Street Sweeper]

I posted this question on the engine page - thought I might get more input if I posted here as well . . .

I've got a '65 suburban with a 230 L6. I'm ignorant on these motors - I admit that up front.

On an inline 6 (194/230/292) the intake and exhaust manifolds are bolted together. If I wanted to make an exhaust change (headers, etc.) without the expense of replacing intake and carb at the same time - is it possible? Can you run stock intake / aftermarket exhaust or vice-versa?

If so, what would I need to do to make it work?

Thanks for your help. I apologize up front for my lack of knowledge on all things L6.