slant six exhaust manifolds

You want to open the exhaust ports in a way so that the manifold port edges are inline with or slightly larger than the port edges on the head all around, so that there are not any 'steps' for the exhaust air to hit. Of course, then you have to worry over the gasket.....

Chekc out this /6 exhaust manifold article....
http://www.slantsix.org/articles/Sl...n/Slant_Six_Exhaust_Manifold_Installation.htm
Yes I have seen printed that article.

The article states..........Check any used manifold for warpage, use the gasket as your "inspection tool". If the end exhaust ports are more then 1/8" higher then the intake port next to it, best find another manifold..............

Ok my end exhaust ports are 1/8 higher ( on some of my manifolds ) . Why suggest to find another manifold? It would be easy enough to dremmel out the ports so that they would still match the exiting port on the head.