340 cam specs?
Cam Craft did all the old school masters and maybe even the OEM cams I know they did the 413 long ram and an early Max Wedge
before Racer Brown
(Isky also had an excellent .904 Max Wedge grind which we beta tested early sixties) great work without even the old computer Harold Berkshire used.
They could have done the original 340 cam, early Direct Connection Cams