Larwood for Australia would have been menance. Also would have full career rather than what he got, sadly.
Not sure about that. Australia at the time was, if not exactly a graveyard, certainly a much less friendly place for fast bowlers than it is today with timeless matches promoting generally drier wickets and spin-bowling. Furhermore, although there were various fast and fast-medium bowlers about (including some throwers), they weren't likely to be picked.
Australia hosted five five-test series in the 30s. Against the West Indies in 1930/31, specialist fast-bowler Wall was picked only in the first test, with others opened with
Fairfax (Wall's opening partner in that test, and an all-rounder) and Hurwood or Oxenham - medium-pacers with the former also bowling spin.
Against South Africa in 1931/32, Wall partnered with McCabe's mediums in the first two tests, and specialist medium-pacer
a'Beckett (4 tests, 3 wickets at 105.66) in the third. He was replaced in the 4th test by Thurlow (fast medium), who was replaced by Nash (fast) in the 5th, both opening with McCabe.
Against England in 1932/33, Wall played the first four tests, but only had a specialist seamer at the other end (
Nagel) in one, and McCabe in the other three. Wall was replaced with Alexander (actually fast as well!) in the final test, and Alexander kept the same opening partner.
Australia hosted only one more test series in the 30s, against England in 1936/37. Ernie McCormick, a genuine fast-bowler, opened the first two tests with
Sievers (fast-medium, and something of an all-rounder) and the fourth with McCabe. Seivers and McCabe opened in the third test - I'd presume McCormick was injured. Only in the fifth test did McCormick have a proper fast bowler - Nash - at the other end.
In twenty tests, Australia picked two proper fast-bowlers only once and partnered them with a specialist medium-pacer in five. In five, no geniune fast-bowler was picked at all, and some of the medium pacers had at least pretensions to all-rounder status to aid their selection or were really more batsmen.
If you look at overseas tours, you see the same pattern occurring of only picking one specialist fast or fast-medium bowler and partnering them with Fairfax (21 wickets in 18 innings at 30.71) or McCabe (36 wickets in 62 innings at 42.86). The final test of the 1938 Ashes (the Len Hutton record and 7d/903 test) was opened by two medium-paced all-rounders in McCabe and Waite:
Wisden said of this: "The sight of McCabe and Waite beginning Australia's attack in a Test match was almost ludicrous."
In contrast, England was - helped by Allen's batting average of 24.19 to go with his bowling average of 29.37 - usually able to pick an attack of three decent fast or fast-medium bowlers. They consistently picked a faster attack than Australia. And yes, I recognise that Larwood debuted in 1926, however conditions in Australia were not generally different, and Gregory, our only regular fast-bowler, was an all-rounder (so was medium-pacer Kelleway who opened with him after McDonald moved to England).
Larwood averaged in tests 28.35, compared to Gregory's 31.15, Wall's 35.89 and McCormick's 29.97, so he was better than the Australian regulars (not helped by the 1930 Ashes, where with Bradman playing he averaged 73.00). However, his record in Australia shows perhaps why bodyline was so noteworthy. In 1932/33, he averaged 19.51, but on his Ashes previous tour in 1928/29, he averged 40.22, taking 18 wickets in 10 innings - 8 of these wickets came in the first test as well.