The Dellow kit is not cheap, as it is more than an adapter plate. It actually incorporates the front part of the gearbox. The upside is that the gearboxes are cheap. They are cheap because they are good.

Huh? Good boxes dont break much in normal service, & they have a long service life, & demand at the wreckers is low, so they are priced to sell.
Those who remember the rubbish 4 speeds first used behind Holden 6's will also remember that wreckers wanted a lot for them. They broke a lot, & demand was high.

Much as i hate to say it, the Toyota boxes are a bloody good trans & are a good choice behind a hot A series.