Exhaust Manifolds

[Chetzki]

My headers have extra bolt holes on the engine block on both front and rear of each manifold. Anyone else have this? I bought this car over 2 years ago and haven't noticed anything that was not stock. The manifolds are rusty but the rest of the exhaust system has always looked good as new and I wonder if any of this system is original. How could I tell? Sorry I don't have a digital camera yet.

Chetzki

 

[LT4John]

I also have a LT4, and also have the extra bolt holes on the engine block on both front and rear of each manifold.

 

[Chetzki]

I'm not surprised. I got to looking at it after someone else had a thread about headers and noticed those holes.

Thanks!
Chetzki