Sun is over the yardarm here, so 'cheers all' ...

I knows a wimmins wif a bush like that..🍑

Hope your kazi’s could cope with this beast 😂

I know from doing a similar job some years ago that it likely will be possible but will be a mix and match of parts and you better keep a note of what was done for later repairs. As above contact Mike at Brittanica.

Probably should contact Brittanica Restorations in Canada. He could help you out, especially with sourcing of parts. All the best :)

I take it you mean grind off the galvanised coating around the new weld area, prior to attaching? Yes it has a reduced size at the end.

Cut it off and bash the new one in and weld it on, if you have the one with the reduced tube size. I would support the tub with a jack and piece of wood when removing the bolts. Don't weld galvanised metal as its bad for you.