It was a factory option for celica's in the early eighties but not the Ra23/28/40's. I think there was a 28 for sale in brisbane with a 22R about six months ago so it's doable but if you can get another 18rg wouldn't that be preferable?
I'd probably go the 22R over the 18rc.
I don't think any of the ancillaries or the sump is exchangable between the 18-22.
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