You most likely don't need a new manifold. The surface can be machined by a engine rebuilder.
As the cast iron is relativly soft you even can do it by yourself.
Glue some sanding paper of the right grit to a perfectly flat surface and sand the surface until no high or low spots are visible anymore. Rotate manifold after every stroke or two to make sure that you are grinding even. If you can find a machine shop, let them do the job !
As the cast iron is relativly soft you even can do it by yourself.
Glue some sanding paper of the right grit to a perfectly flat surface and sand the surface until no high or low spots are visible anymore. Rotate manifold after every stroke or two to make sure that you are grinding even. If you can find a machine shop, let them do the job !