No. The 400 is externally balanced and requires it's own flywheel.
Yes.
It should work well.
yes
No. Standard 350 engines have 4.00" pistons, standard 400 pistons are 4.125".
its about 350
The main journals need to be turned down.
Yes. No problem.
any manual trans from a 265, 267, 305, 307, 350, or 400 sbc and i think a vortech v6 well fit to
377
no you cannot. most engines .06 overbore is usually the safe limit. on a 350 .06 only gives you 10 more cubic inch. to get to 400 you would need to bore and stroke it. which gets very expensive. youd be better off looking for a 400 from a donor vehicle.
Yes it will all the tranny bolt ups are the same.