According to the registry, the preceding chassis is registered as a 1960. The transmission is 1964. The previous owner said it was a '65. The engine is not original to the car, it's TR4 CT60xxxE serial. The engine donor was a Triumph TR4 of unknown year.
I'll probably sell both Stromberg systems to fund rebuilding the H6. Since the other duplicate parts don't occupy much space I'll probably save/rebuild them for spare use.

There are no time constraints on this project because I don't have a money tree. I believe that within a year, my time and budget will allow refreshing the chassis, driveline, brake, and fuel system. The build will be stalled until I save funds for purchasing a new body and other Mog-specific items.

Thanks for the book recommendations. They'll soon be added to my library.