Flywheel identification

I am getting ready to convert my skylark from an auto to a 4 speed. I have most of the difficult parts collected and I believe 2 flywheels to choose from. I need help identifying the below aluminum flywheel. It looks similar to the TA flywheel in my 2018 catalog and is much lighter than the stock steel one pictured below. Crank bolt patterns are the same and the ring gears have the same tooth count. I can’t find any part numbers, but it is stamped AO.

Also- is it even worth using for my build? Low comp 455 with 70 iron heads, B4B, bored .030 and TA shorties. 67 M20 with an 11” zoom perfection clutch. Nothing real fancy or high performance here.

Thanks for the help!

 

If you don't have at least 10:1 overall first gear starting ratio don't use the aluminum

 

Thanks, dropping the steel one off to get resurfaced tomorrow.

 

You by chance interested in selling that aluminum one?
Thanks
Brent

 

plan on keeping for now, will let you know if that changes