I had the 350 and the 326 out both have flwxiplates that I have left in place the beveled or slightly angled edge on the teeth goes towards the transmission.
As has been said you should be able to spin the TC and it should have about a 1/8" gap between it and the flexplate.
67 Firebird 350, TH350 auto Convertible, B&M 3000 TC, 4bbl Edelbrock Performer carb and intake Black Jack headers,disc brake conversion. 10 bolt chevy axle with 3.73's and B&M Rachet shifter.
