> Date: Wed, 30 Aug 2006 10:26:18 -0500 > From: [EMAIL PROTECTED] > Subject: Hardened Valve Seats; WAS: needs 73 98 455 engine specs... > > Hi All, > > I thought hardened valve seat came into production Olds in > '71 or '72.
It was in '72. That's what the addition of the small capital letter A behind the 7 (sbo) and G (BBO) heads means. Kenneth 1971 Cutlass Supreme convertible Phoenix, AZ
