Plymouth flathead 6 engine identity...

I recently dragged over here to the good old U of K a 1939 Plymouth PT81 pick up and now that this project is well under way I want to try and properly ID the flathead 6 engine, is it original or not, what size is it etc. I have searched through previous threads with no real luck sofar so hopefully one of you guys can help.

The stamped serial number at the front left of the engine reads;

P24*20582

Help please.........

 

1953 Plymouth 218.

http://www.t137.com/registry/help/otherengines/pengines.html


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Cool! Cheers for the info, gonna try crankin it over and firing it up next week so fingers crossed.

Cheers again.