V8 Breather Hoses

["Paul E. Rivera" <rivera@deltanet.com>]

Did a oil change this morning, and when running the engine afterwards, 
I noticed a substantial intake hissing noise. Poked around and found
that the hose that appears to run under the Intake Manifold and connects
to close by the idle stabilizer, was broken.
I looked on the microfiche and I found 3 breather hoses.
At 150K Miles, I suppose I should have changed them as a matter of course 
when I changed all of my radiator hoses.
Is it required to remove the Intake manifold to change the three?

Will any damage occur to the motor if I drive it in this condition until 
the repair can be made?

On my 86 5KCSTQ, the breather hoses were rotted at 100K miles.

Any tips would be appreciated.

Paul Rivera
90 V8
91 200 TQW
98 A4 1.8tq on order.