fine to mention names, we all like to know .... you could likely have also found those parts at a local store like NAPA, which is where I've gotten them in the past just by taking in the old ones to match ... Vettes pic shows the style ball that has the hex end, the other style doesn't show thru the bellhouse - I dealt with both types just a few months ago, but can't recall now if they had different size ball ends or just different threaded ends

Bill