G'day Aerrow, Mod BB and all

Many thanks for the update.
The Type - 0144 - is the 1968 Scott Bonnar specification.
The engine Code - 6805213 - gives us good provenance for dating.

This engine is rated as a 2HP job.
That will be important for engine decals.

The Briggs 6 Series also appeared as a 2.5 hp job.

This post may be of help in looking at this carby...
Its use is dependant on engine short block condition - cylinder, piston, rings, valves.
https://www.outdoorking-forum.com.au/forum/u...60112-vacu-jet-slide-choke-starting.html

I note that Briggs 'Kool Bore' engines can be honed to de-glaze them.
In fact, that is recommended, but factory procedures must be followed.
It's one thing to de-glaze, another to resize.

A final note on the carby mounting set screws.
I recommend a locking compound be used here with a new gasket.

Many thanks Aerrow for the update.
I'm sure you will help other members down the grass track.

Cheers
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Jack