Here is a link to the Ambler brothers of Ambler, PA.The Ambler logo is on the cam covers of the SOHC conversion(?) parts previously shown in photos in Y block Magazine.
http://docs.google.com/viewer?a=v&q=cache:NHoCCjGnZvUJ:sprintcarhof.com/FileGet.aspx%3FID%3D154+ambler+cylinder+heads&hl=en&gl=us&pid=bl&srcid=ADGEESjNgK_SpdL5dRQiHD65s0uqLjdbJrX59nGDsQW7SX82qnmwKZdphemu6z2rJSD_GXnLpIm6-XYfojxmHESm58dDywog0V2H4H5kfTiS-nToXgTSsiha_07TChT53lADSiFOpn-z&sig=AHIEtbRTbmt8iRnorj_QqqWLBIi8JfIa-w
Mark