Excellent pictures! Thanks, that's exactly what I have. I'm having a guy on ebay make up a delrin bushing and glue it or bolt it inside that useless white plastic retainer. I know there should be a seal in that but I figure with the heat from the header close by it wouldn't last long anyway. Making OD to fit in that retainer and .100 or so bigger than the od of the shaft just in case it isn't perfectly centered to the box. should help center it for installation and reduce all that play . Feel better seeing others like it

Beautiful restoration job by the way!