O.k. found my post on head porting and manifold preparation. All of the porting work I performed was done with a rotary die grinder (Dremel thing but cheaper version), a power drill and a flexi-drive attachment. I also made a special lapping tool from a dead screwdriver with a bit of folded medium grit sandpaper to dress the port walls - http://www.mightyram50.net/vbulletin...ll=1#post31683