8 to 10 degrees BTDC / before top dead center.
yes
Yes.
yes but it has to be 83 or newer
No. Standard 350 engines have 4.00" pistons, standard 400 pistons are 4.125".
its about 350
It should work well.
The main journals need to be turned down.
YES. That is a direct bolt in.
There are none.
Yes. No problem.
It depends on the cam.