D/Dart + 360 Crate Engine + 122 tooth flywheel = Trouble ?

Have I opened up a can of worms? Bought the D/Dart last year in April. Drove it a few times and the 4-speed trans started sounding funny. Come to find out it didn't have any fluid in it. So I filled it up and it started leaking in the front. The pitman arm was rubbing on the left side of the oil pan so I decided to fix everything.

To make a long story short, - I have the engine and trans out and decided to put a new pressure plate and a better clutch disc in it plus, use the correct flywheel and pressure plate bolts. I'm getting ready to put the clutch in and come to find out, the 360 uses a unique flywheel that is externally balanced.

Is anyone using the small 122 tooth flywheel on a 360-380 HP Mopar crate engine? If the 360 engine requires an externally balanced flywheel, wouldn't the harmonic balancer do surfice?

Wouldn't the 122 tooth flywheel be balanced since the 273 engine is balanced internally and the flywheel isn't part of that equation?

It currently has a roller bearing bushing in it. Is the back of the crank drilled for the brass bushing.

Help -- any thoughts on the 122 tooth flywheel?