I'm leaning towards doing this from the bottom, follow up question.
Car is completely together now, I drive it every week.
Any issues with leaving the 518 in when I pull the 340 with the K-frame?
Seems it would be easier to leave trans in car, then transplant the 5.7 and reassemble?

I'm embarrassed to say it took me 2 days to just get the 5.7 out of the shipping crate and on the dolly.
Tried to lift with the wrong HW, tipped motor breaking wooden dolly and leaking oil all over garage.
Repaired dolly, spent another $100, cleaned up garage and have motor ready for engine stand.

This is gonna take awhile...............

Thx