Flywheel part#/ swapping from 273 to 360

Looks like I will have to call the machine shop, and dig thru my reciepts to see what I can find.I built this engine after my mom passed away while building the drag engine for my 62 Valiant.....payed the 360 off, and 2 days later my father in law passed.Then....it has sat.Its all a blur. I do remember I bought a new scat crank for it.....geez,I feel like a heel that cant even remember! Sorry.....gonna start looking now before work.
Thanks for the help so far, I did buy a new Summit Balancer for it, I can get the numbers off it, and that could tell me alot.