Technical 1949 mercury 350 chevy Saginaw 3 speed swap questions

I already have the 350 from another project and it's only got around 5000 miles on it. I have mopar motors in my other cars lol

 

I'd be interested in part numbers

 

I’ll try to get the flywheel number
I do know the flywheel came from a 64 c10 with a 230 6cyl.
The trans mount was a generic 80s gm trans mount. Can be bought with a stud or bolt for the crossmember mount end.
I had a th400 and bolted the merc mount to it to check fit. Had to clearence the mount holes about a 16th to fit.
The merc pressure plate and disc will get rebuilt and used.
Speedway has the tech sheet for the setup info on their site.

 

OE merc disc on the gm flywheel.

casting number

 

Thank you very much.