Some cars can have the stock steel tubes removed easier than others. One owner found that when he removed his main console, the heater tubes leaked.... because one of the clamp retaining screws was drilled right into the line.
You don't really need to pull the engine for removal unless you want to pull the tubes all in one piece for some reason. Chop the things into manageable sections- just like we do to the OEM 'long' radiator water transfer tube when going with stainless.
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