67 (YENKO) baldwin motion identification question

[berger]

hi, and thanks for your help- can't give you the cowl tag, because its not original, and the vin tag on the door jamb is gone someone wanted them real bad to rip those rivets out. I cleand up the top of cowl where the vin is embosed starts w/ 7N then looks like 229711 could be 717 or 777 I'll have to keep cleaning it. thanks , by the way it has vintage traction bars bolted to both monoleafs still in car.