Flywheel part#/ swapping from 273 to 360

Hello all, My car is a 67 Barracuda w/ a 273-origionally a 3 speed car on column.
About 5 years ago( maybe 6 or 7) I broke the origional column shifter drag racing it...shocked?LOL So, having alot of extra parts I decided to put in a 4speed, and floor shifter.Had to find out the hard way from Brewers Performance that I neded a new bellhousing, flywheel, and incedentials.
Fast forward to now-The car runs and drives fine! BUT-I built a 1977 360 into a stout replacment.I am trying to gather everything for the swap and in doing so thought back to the flywheel I bought.....so my question:
Are there part numbers on the flywheels to distinct from internal and external? Can either flywheel be changed into the other? I DONT remember exactly what I bought from them, other than it is a 10 1/2,so I am trying to make sure of what I need to order from them again, as I need a pilot shaft bushing, and might as well do a Z-bar rebuild too.
Sorry for the long read, just trying to give all the info, and I am sure I missed something( my mind is faster than my fingers.LOL)
Thanks in advance!!Andrew/Kidd
Author: admin