Here is a pic of the timing mark. If yours is gone try this simple homemade tool to locate TDC. I also attached the tune-up spec sheet for this motor.
Harold
Attachments
1946-50 Timming mark BB -1.jpg (41.77 KB, 172 downloads)
1950 Timing Mark Location Tool.docx (12.59 KB, 33 downloads)
SHA1: eeea08faf3377f1e24ed80ff130e976513ab7408
1950 CHEVROLET 216 ENGINE SPECIFICATIONS.docx (18.08 KB, 19 downloads)
SHA1: e26ab89194f4d44febe0b9f2b616d5ac806a1764
Flywheel Timing Mark.JPG (218.55 KB, 164 downloads)

Last edited by Harold46; 01/14/2020 2:46 AM.

Harold
Is a restoration ever finished?