To be sure, take the numbers off of the drivers side rear of engine and check with dealer.
How can you tell a 350 from a 305 engine?
by the dispacement
no
They look the same.
The only 350 available in a 1984 El Camino was the diesel. If your V8 isn't a diesel, it's a 305.
u can listen to the engine
The eight digit in the VIN # will tell you what engine you have. If you have the number 8 it is a 5.7 (350)
5.0L is a 305. 5.7L is a 350
YOU CAN EITHER TELL BY THE HARMONIC BALANCER THE 350 IS THICKER THAN THE 305 OR YOU CAN TELL BY LOOKING ON THE BLOCK ON THE FRONT OF THE PASS SIDE HEAD THERE IS A FLAT SPOT ON THE BLOCK THERE SHOULD BE SOME NUMBERS AND LETTERS FIND THE LETTERS AND CALL A PARTS STORE
350
If you are asking if you can substitute a 350 for a 305, the answer is generally yes.
305 TBI IROC HAS 350 TPIno such thing as a 91 iroc camaro. rs had 305, z28 had 350 im not sure if the z was available with the 305.