Both of mine are truck engines for sure and I'm 99.9% these are the original parts to those original engines since I can follow the history of both back to when they were delivered. The truck and car must be different, but can't understand why they would be. A bit more research turned up this:
According to the 1929-1954 parts book:
All the specs are the same as the 1929-1957 parts book as follows.
According to the 1929 –1957 parts book:
47-55 COMM., UTIL., 1st Ser. (exc. D-D, COE),
49-54 PASS.,
53-55 CORV. 6 cyl…………………………………………….. (15 3/32 under washer)………….3701556
55-57 PASS. 6 cyl.,
55-57 COMM., UTIL. (6 cyl.)(2nd Ser.)(exc.D-D) (15 7/16” under washer)………….3710349
47-57 COMM., UTIL., (6 cyl.)(exc.D-D, COE),
49-57 PASS., CORV. (6 cyl.)………………………………..Tube (8 7/64” O.L.)………………3705397*
*NOTE: On jobs prior to 1955 cut to 6 ¾”.
Off subject for Peter Rabbit;
Remember this discussion Pete???
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0190.htm Denny Graham
Sandwich, IL