Hello Banjupb

It's great you got the image uploading sorted, as we have
had some issues with this (using mobiles).

Your machine has had a makeover at some point.
The Model 33 (in all guises) was never fitted with B&S engines.

Yes, introduced in 1960, the Model 33 was the per-cursor to the Model 45.
It had a couple of design changes in the transmission and engine choice.
These are respected machines - and well engineered.

They re-entered production (alongside the Model 45) as the 'Lawn King'
In the blue search bar (top) search for Model 33 and Lawn King.
There is a lot of information on ODK about the Model 33.

Basic, generic parts are available - bearings, chains, etc.
Nothing is impossible though ...

Here is a brochure of the Model 33 fitted with a Kirby:-

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/61309/BROCHURE_-_Domestic_Product_Li.html

Hope this helps.
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Jack