Bill,
This certainly makes it appear that there was a Culver LFA, NC41737, s/n 459 with a Franklin 4AC-176-F3 engine installed, manufactured on March 23, 1942. I've never come across a "Form 132" before and the typed format makes me wonder if this was a CAA form, or a Culver form. The assignment of an "Identification Number" indicates that the aircraft was registered with the CAA. The manufacture date indicates that the aircraft was completed. This does not indicate that an airworthiness certificate was issued.
You indicate that you located this in the FAA files. Was this the result of a request for research of the serial number AND n-number with the Aircraft Registration Branch in Oklahoma City, or did you find it by some other method?
Brett