I am open to either method. As far as old brittle connections, I replaced all the rubber parts about a month ago. I had intended to replace the intake gasket, and did not because 1) I was pressed for time, and 2) I could not easily locate where the last connector on that branch of the wiring harness terminated.
With no worry about brittle connections, would you still leave the intake in the car?
Something else that does not seeem widely discussed is whether to remove the exhaust manifolds from the pipes or from the heads. Since I will be flushing the coolant system, I can douse the nuts with liquid wrench and run them thru a warm-up and cool-down cycle at least twice. This might make removing the manifolds from the heads a more attractive option. What are your thoughts on this?