I'm looking at a 55 and need help. According to this site, the engine # should start with a "V" followed by a number. This number, 12783587, falls within the proper 1955 sequence but does not begin with a "V". Also the trim code is "74". The trim codes on this site seem to be three digit numbers. There also is an "Acc" line on the cowl plate which reads "B1". Any help would be appreciated.