Depends on how the motor is set up.
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.
305 horsepower
305
235 horse is stock on 98 305
the 1986 Chevy truck 305 HO produced 180 hp
More information required.
they were available from 140-185 hp.
about 165 hp
Advertised horsepower is---140 HP @ 4000 RPMs.
20HP/ Horsepower. The 350 has 20 Hp more.
The 305 HO was the highest power version.
140-185 depending on the application.