Locate my 1968 Barracuda Formula S VIN# BH29H8B412316

acavdragoon said
On that fender tag, bottom row far right isn’t those six digits the last part of the VIN? If not, what do those numbers mean?

It's the sequential car number.
Sequential numbers start at 100001 (the first car down that assembly line at the beginning of that model year). Some A-bodies in the early and mid '60s started at 500001.