Imagine if they'd actually kept going into WC, WD etc. The WB ended circa 2/1985. By 1988 we had an injected 5.0L. So assuming the W size made it till then we'd have had injected WD Holdens with TH700R4 and T5 boxes and Borg Warner diffs. By that stage the old W size would have been close to 20 years old!