Elmer,
VP-93661
VP
As you mostly likely know, the V was the 1952 model year code for a 4-speed, but the readily available book of codes does not show a "P".
Maybe the "P" is an "F" or maybe the "P" code indicates that the transmission was used on a larger truck in 1952. I believe the larger trucks did not have the torque-tube housing at the rear; but, that housing is easily swapped between any SM420 open- and closed- driveshaft transmissions.
Tim
