One of the 727's is a BB 4x4 unit # PK 3681056 4040 542. It operates fine and is in used condition.
The other two are professionally rebuilt by AMMCO, # PK3681053 4345 and # 2892088L 2609.
$225 for the AMMCO's 4x4 BB $ 145 all plus shipping from 05769 Vermont.
