Yes it will bolt right up.
no the 2.0 is a narrow block and the 2.6 is a wide block.
YES, That is no problem, it will bolt right up.
Yes it will, Direct bolt up.
as long as it is a chevy bolt pattern th400
Yes it will, it is the same bolt pattern.
not same block , 5.8 is longer stroke , same bore , bigger block, heads, cam and water pump will interchange
No the 350 small block will not bolt up to the 3.1L V6. The 3.1 is a 60 degree block V6 and the 350 is a 90 degree block.
A Nissan 300ZX? No
If it's a 350 from a Chevy, yes.
There are adapters for everything.