No. The 400 is externally balanced and requires it's own flywheel.
yes
yes
no
NO.
No. The 400 is externally balanced, the 350 is internally balanced.
It will on anything older than 1986. Probably work on the newer ones too.
Just the crank. The flywheel is neutral.
remove the enigine and then take out flywheel bolts
A small flywheel needs to stay with the starter that goes to it. You can use either flywheel, and the block should be drilled for either starter.
410 at the flywheel
NO
No it's not.