Have any of you guys seen a 1961 Impala,Bel air,Biscayne, Nomad, Parkwood, Kingswood with a factory dash mounted positraction plate? Reason I'm asking my friend has a black '61 Impala (non SS) he bought in fall of '61 with factory 4-speed, 348 250 HP. It has the positraction plate on the dash right beneath the cross flags and I saw a '61 Bel Air sedan with this plate back in 1989 in a bone yard and tried to get it off though it was riveted on. I was told it was 1958 only though my friend swears it was on there when he bought it new and looks factory installed like the Bel Air I saw years ago. Thanks.