1973 & 1974 MORE PHASE IV HI OUTPUT B S STILLWELL"S Mick Webb saw there was a demand for more of the evolving V8 grunt local Aussie muscle cars so a GT-HO PHASE IV power upgrade was offered

In 1973 Mick Webb manager of the BS Stillwell RACING DIVISION was arguably the first to influence Bib Stillwell to build more GTHO PHASE IV'S was arguably the first to influence Bib Stillwell to build more GTHO PHASE IV'S