Hello Gents. I purchased a Willy's last week. I found the engine serial number and I am hoping someone with a lot more knowledge and experience is able to help me decipher what the letters/numbers mean. The first marking appears to be a M ( I am guessing) the rest of the number reads B-341560. Any help is extremely appreciated. I also found a decal restoration plate attached to the bottom of the engine. It appears it is a restored engine.