A guy name Twisted6 (Larry) is doing some work on "lump ports" for the 250/292 and is setting up a web page for it. I see that Ken, who is doing a lump port, has found it. Very interesting pictures of cut open heads.
Lump Port
I'm quessing he plans on selling the lumps at some point. For now he's putting out a lot of info.


'67 GMC 3/4 292 4spd