The manifold needs to be the correct one for the engine.
Either the manufacturers part or an aftermarket part.
Manifolds for automatic transmissioned cars normally have an extra drilling in them for vacuum lines
Manual transmission use single plane. Automatic transmission use dual plane.
you can as long as you use your TBI heads if you want to use the vortec heads with TBI you will need a special intake manifold or a carb manifold with a adapter to mount your throttle body to the carb manifold heres some more info TBI heads will mount to the vortec block TBI intake manifold has 12 bolts vortec intake manifold has 8 bolts
Do you mean intake manifold OR exhaust manifold. Need to know NEUTZ.
yes
use, DEXRON III automatic transmission fluid
No, it will leak.
It limits the amount of pressure that can be built up inside the intake manifold.
No.
You need to replace the manifold and use Felpro Gaskets.
You would need a ring gear for an automatic.
Basically you remove the throttle body, fuel rail, and anything else that is plugging into it, then unbolt it. You need to get a shop manual however, because there is a specific bolt pattern you need to use to avoid damage.
if it is an automatic use ATF + 4