If the paint is the main thing.
Working at home, I would remove the engine without gearbox out through the top, taking plenty of time and care and using rubber mats in the eng bay - because the eng/box seems to always swing sideways, scratching the paint. And when clearing the gearbox, I've hit the nosecone on the sump. Also, I don't like undoing main bolts like the K frame unless I really have to.
And get/borrow/hire an engine leveller - you'll actually smile changing an engine. lol
(I would only remove the K frame/eng/gbox if I had a two post hoist).
If your garage is a concrete floor laid on a waffle pod and you're using a bottle jack, put wide supports under the jack.. They've been known to crack through the floor and kill.
In the end, always got to minimise the chance of damage. (= time, money, blood, sweat and tears...)
Cheers