For anyone who hasn't read these, they are really well done, It's Chris Willis same guy who did the top 100 books. This new one is for 1934:
http://nflfootballjournal.blogspot.c...troactive.html
Notice the excellent comment about linemen from one our own board members. Reminds me of when I did my 30s draft - the lack of information makes evaluating players from this time period a real challenge.