Nothing.
Subtract 305 from 350 and that will give you the difference (or interval) between the two numbers:- the answer is 45. However, if you mean what is the difference between a Chevy 305 and a Chevy 350, then it is the difference between the engine bore (the cylinder) sizes. The 305 bore is 3.740 inches. And the 350 bore is 4.000 inches, giving the Chevy 350 20HP more then the Chevy 305.
different pistons and cam, bigger intake valves.
Different pistons, bigger valves, different cam.
The harminoc balancer. The 305 balancer is thin and the 350 is thicker and heaver.
how to adjust the timing chain on a 1988 kz 305
Depends on how the motor is set up.
the biggest difference is obviously the stroke and bore of the engine and the size of the engine
The starters are compatible with both engines, just the 350 starter will probably put out more torque than the 305.
Primarily the bore size. The 305 has a bore of 3.74 and the 350 is a 4.0 bore. They share the same stroke on the crank. And no, you can't bore a 305 to a 4.0 bore.
The HO engine had higher compression, bigger intake valves, and a different cam. Also, it was painted black.
20HP/ Horsepower. The 350 has 20 Hp more.