LA 340 Intake Manifold
You can get a good chunk of $$$ for that M1 intake if you don’t price it too low, no need to under price, I bet you could sell it here quite easily, especially if it’s unmodified or undamaged. You may find a good used Edelbrock RPM or Air Gap if you keep your eyes peeled. Might end up being an even swap. Doesn’t look like you’re pressed for time so take some time and look around.