'65 Valliant driver's seat adjustment

So, I reinstalled the original front seats in the car over the winter... I like the lowback seat look. With the seat adjusted all the way rearward, it is a little uncomfortable to drive as my knees are bent. I'm only 5'7". How did tall people drive these things back in the day?? Was everyone shorter back then?? Is there something I did wrong.... or do I need to drill new holes to set the seats further back for comfort? Any input would be highly appreciated.