Well at least the engine and transmission are a match.The motor is a 56FL and it is my intention to restore the bike as original as possible.
But as it seems now it is going te be more work than I thought.
The chopper days were hell on frames, and straightleg frames got the worst of it. They were the most desirable for customs and many bikes were split up just for frames, including Knuckleheads ( the reason why so many Knuckle frames were modified for pan engines). depending on how high your VIN number is the frame you need would be a date code from about June '55 to May or so '56. Those were not real high production years so that is about the total range. We were into a recession by the mid to late '50s and motorcycle sales world wide went down for all brands. My '54 FLE is a straightleg version as it was late production. Luckily all the 'late '54 to '57 frames are the same so any will work. If you are going for 100% accuracy though you need to try to match the month with the approximate build date of your bike. Hard to do since actual records do not exist. However some folks with original unrestored machines have been generous in providing some of the info to at least come close.
So it appears you will be in search of a frame!! Good luck!