First, if it is running good, I would let it go. The black soot you see usually indicates a rich fuel mixture or you make a lot of short trips.
As far as parts, none of the gaskets are reusable. In parts, I would estimate 500.00. As far as the head, if you plan to rebuild it, you require valve grinding equipment like a machine shop would have or engine repair (may have). Usually, that work is sent out.
Friday, January 7th, 2011 AT 11:05 PM