Chevy flywheel numbers

Im trying to find some info in what tooth flywheel I have,Motor is a 350,I was able to see these numbers through the bell housing on the flywheel-973456 GM 1 thanks for any info

 

Still have had no luck finding any info on this flywheel-any body got a clue-Ive searched for weeks-nothing

 

3973456 is 14” diameter, 28 Lbs. with 158 teeth, used with an 11” clutch

 

thanks for your response and info, LowKat-is that for a two part rear main seal?

 

Yep 2-part seal