No it is not completely different bolt pattern and dimensions
Yes it will. It will bolt right on... 100% interchangeable.
Yes, they are 100% interchangeable, so it will bolt right on.
yes it will fit, any smallblock Chevy intake from 86-55 are interchangeable, the 86 and newer have bolts that go staight down instead of on a angle
No. They are not interchangeable.
Yes they do at the intake manifold gaskets.
what about it?
Remove the intake manifold retaining bolts from your 1996 Chevy Astro Van. Remove the manifold gasket and clean the surface. Reverse the process to install the new intake manifold gasket.
There is no difference,,,
yes
Assuming this is a 4.3L engine, the upper intake manifold gasket would be between the upper intake manifold and the lower intake manifold.
intake manifold is DIFFERENT for models 1985 and 1988
Yes.