All the dimensions are the same, but it should be re-balanced for the lighter pistons.
yes but the engine will have to be rebalanced
a Chevy 350 crank is a Chevy 305 crank. they have the same stroke, 3.48 inches, and are interchangable. swapping between the two cranks does not change the engines displacement
it should de-stroke it to something around a 327. it will fit but be sure to check for crank to piston and piston to head cylinder top clearance to ensure you don't run into engine detonation. ummm no 305 and 350 have same stroke a 400 crank would make it a 334... same main and rod journals also stroke is 3.48
If you are asking if you can substitute a 350 for a 305, the answer is generally yes.
yes
Yes
NO they are to big.
yes it will
yes
engine will fit, but 305 tbi will be too lean for 350 It'll burn up
all external bolt on parts will work. heads, intake, dist, cam, pan, timing chain, oil pump etc. should all work as well. most internal parts will not work though. such as pistons crank rods and block. The 305 crank will fit the 350, but will need to be balanced. i would not use the 305 heads due to small compression chambers.
305 is the same distributor as a 350 will even fit some big block chevy's.