Repair or replace leaky evaporator?

Hey gang,
Finally got my A/C system put together, only to find a big vacuum leak at the evaporator. Evidently a crack on the lower bulkhead connector. My question is which option makes more sense, have the OEM unit repaired, or buy a replacement evaporator? Car is a '69 cuda, new-style Sanden Compressor, original components inside the cabin. Thanks!