Assuming the converter is neutral, as most aftermarket ones are, then Yes, you use an LA 360 balanced flexplate.
The Balancer (which we sell for under $90, and include on most dressed engines) uses the magnum weight for our engines)
Mopar Small Block Harmonic Balancer | 273 | 318 | 340 | 360 | 408 |
if its purchases on its own, it comes with various weights for all SB balances.