interesting swap...is balancing a problem

[Jacksboys]

I might be giving my 360 engine to my father if he keeps having problems.
Well my 360 was balanced using the B&M flexplate, so I did not have weights on the torque converter.  My father has the 360 flywheel on his motor. 
Is there a way to take my flexplate and have the flywheel drilled out to match, so the motor will not be unbalanced, or would you think the flywheel would be close enough to just put on and run?

[Chryco Psycho]

the balancing weight "should' be the same assuming the B&M flexplate was not altered , but with any custom balance the weight could be off slightly 

[tactransman]

the balancing weight "should' be the same assuming the B&M flexplate was not altered , but with any custom balance the weight could be off slightly 

[moper]

What they said. You have either the correctly counterweighted flex plate...or the correctly counterweighted flywheel. In either case, you're fine.

[Jacksboys]

Thanks for the info.  As far as I could tell, the flexplate and flywheel were not altered when balancing.